I suggest that you ask Chris (SRS) if he is likely to get any more re-furbished K20D's at under £400, mine had only 690 shutter actuations from new!

The 55-300 is very well built and is a cracking small/light useful tele-zoom, by far and away the best low priced tele-zoom made by anyone, I've had all the other alternatives (Sigmas and Tamrons) and it shines, holds f4.5 up to around 210mm, f5.6 up to 280mm, only the DA*50-135/200/300 (or an FA*200/300) outperforms it, I do know as I had a FA*300 f4.5 until recently. I was going to get the DA*60-250, but might now get the DA*300 instead, as I find the DA 55-300 acceptably fast enough and high enough IQ from 55mm to 200mm. For the money, £149 after cashback, it's unbeatable!

I actually decided to go for a K20D rather than any new lenses and find the many incremental improvements and also the additions above the K10D to be very worthwhile, not to mention the extra resolution and improvement in dynamic range of the K20D.

At the moment, if bought with a lens, there is a £100 cashback, which makes it very attractive. Looking at your line-up I would suggest the K20D plus a DA55-300, making it £638 from SRS, if you then sold your K10D you should recoup approx another £200+ to reduce the outlay.

If Pentax UK haven't any stock because it's a new item, then the price, when announced, will obviously be based upon new Euro/£ calculations as there isn't any "old" price.

I have no idea, but I would imagine that any "not yet available" items would be subject to the new prices.

I would ask Chris at SRS if he has any on order and at what cost.

Pentax and most camera makers are increasing prices soon due to the drop in the value of the pound against most major currencies recently.

Pentax are increasing UK prices on new orders to dealers from Monday 1st Dec by 15%, the Euro prices remain unchanged.

Dealers who have reasonable stocks and order coverage should be able to continue to offer pre-increase prices for a short period.

I know that SRS will do this, see link

Don't know about other dealers.

If you are contemplating any new purchases, I would suggest that you don't delay

I wouldn't hold my breath on a FF body from Pentax within a couple of years. I believe a medium format (645D) is much more likely in that timeframe.

Personally (IMHO) I expect to see much more development within the APS-C sector over the next few (5?) years, rather than any FF diversions.

But then, anything is still possible!

I think the reverse is actually going to happen, I see Samsung jumping out of the DSLR market and entering the small body/large sensor market with their own new short register mount. They as much as said this in an interview during Photokina, where they said the competition from N, C & S in the DSLR arena made competition "very difficult" and they were actively looking at new developments such as micro 4/3 rds, but with APS-C sensors.
There is no doubt that if micro 4/3rds is properly implemented, which I'm sure it will be, many people moving from P&S to DSLR will move to micro 4/3rds as well as new simple DSLR's such as the K-m.

I think Samsung are constantly looking to expand where they perceive the "grass is greener". They seem to understand the P&S market much better than the DSLR market.

I don't think Pentax needs Samsung for survival at all, while the cross supply of bodies and lenses for electronics and sensors has presumably been beneficial, Pentax have said that they will use the best sensors they can find for each of their cameras, no matter who makes them.

I can see Pentax continuing to use Sony sensors for future models as well as Samsung. I wouldn't be surprised to see the next generation of K200D (K300D?) use a 12MP CMOS Sony sensor with such features as live view and maybe even movie mode to make it an alternative to the D90 and the next generation K20D (K30D?) still use the Samsung 14.6MP sensor with improvements to the body/LV//AF/fps/(movie mode?) to make it much closer to the D300, E3, 50D.

This will give a much clearer delineation between models:
K-m (K2000D) - 10MP CCD
K300D - 12MP CMOS
K30D - 14.6MP CMOS

If Samsung don't continually develop and improve the 14.6MP sensor, I could see Pentax adopting the next generation of Sony CMOS APS-C sensors featuring their new back illuminated CMOS sensor technology.
http://www.sony.net/SonyInfo/News/Press/200806/08-069E/index.html

I'm sure that Hoya has considerably improved negotiation power with Sony as I wonder who Sony/Zeiss buy their lens blanks from?

Japan Inc., is a much more intertwined entity than many believe or understand!

Thom Hogan has a long history of FUD about Pentax which is totally boring.

If anyone wishes to be bored further, then reading the following thread in DePressing Review will tickle your fancy!

http://forums.dpreview.com/forums/read.asp?forum=1036&message=29980583

- Typo error! Spot on, sharp eyes! Now corrected.

Fisheyes: Pentax DA 10-17 and Zenitar 16mm FE prime

Pentax DA 10-17.
Pros.
Small size
Zoom
Great performance
No perspective stretch
Affordable, especially with the cashback currently offered in the UK.
Cons:
Fish-eye distortion, can be de-fished quite successfully at the longer end (i.e. 14-17mm) by software like PTLens. Although you can defish 10mm shots they become very prone to extreme pixel stretching, softness and CA.

Zenitar.
Pros.
Low cost (usually under £100 from (generally) reliable eBay sellers)
Small size.
F2.8, but soft wide open
De-fishes well, has a FOV similar to a 14mm rectilinear lens.
Cons.
Manual lens (No AF or Auto stopdown)
No zoom
Russian build quality, i.e. old fashioned all metal, but a bit rough around the edges.

I haven't included the Sigma Fish-eye lenses as they are expensive, large and from my own experience, not that wonderful.

Rectilinear super wides. - Pentax DA 12-24, Pentax DA 14 and Sigma 10-20.

DA 12-24
Pros.
Constant f4.0 aperture, quite fast for a wide lens.
Very sharp and even across the frame edge to edge, with high resolution, even wide open, outperforms the DA 14 up to about f8.0.
The best colour and contrast
Very well made.
Zoom and AF - Covers up to 24mm which is probably the nicest street photography focal length. Probably one of the best Pentax zoom lenses.
Cons.
Some CA (which is correctable in post processing with a lot of software)
Some barrel distortion at 12mm, but is not moustache distortion and is readily correctable.
Large (77mm) filter size. Need slim filters to avoid vignetting.
Very large hood (actually a good thing, but you need to know!)
Expensive (compared to the Tokina 12-24, it's sibling) but better with the current UK cashback.
Not much else.

Sigma 10-20
Pros.
A bit cheaper than the DA 12-24
A bit smaller, especially the hood.
Covers down to 10mm.
Zoom and AF
Lowish CA
Cons.
Quite a slow lens at f4.5-f5.6 (very "consumer" IMO).
Not that sharp wide open, nor very even across the frame, poor macro contrast.
Suspected large field curvature problems at the wider end, creates issues with AF below 15mm, best to manually focus to get the correct sharpness across the frame, otherwise the edges and especially the corners in ultra wide landscape shots are often out of focus. You can't rely on the huge depth of field to keep you out of trouble.
Has to be stopped down quite a bit to get reasonable sharpness then diffraction kicks in.
20mm is not quite an ideal street lens focal length, I found I kept changing back and forth between my 16-45 and the 10-20, much more so than with the DA 12-24.
Moustache distortion at the wide end, not so easily corrected.
10mm produces too much perspective distortion to my taste, in fact anything with much wider than a 90 deg field of view (approx 13.5mm on APS-C) begins to create more problems than advantages.

DA14
Pros.
Great build quality
Very good close focus
Usual great Pentax colour and contrast
Low price for a pro grade f2.8 wide angle prime lens
Low distortion and easily correctable.
Lower CA than the DA 12-24
Cons.
Not as sharp as the DA 12-24, needs to be stopped down to f5.6/f8.0 to begin to gain any advantage.
No zoom feature
If you don't need f2.8 and better close focus, then go for the DA 12-24
Not much else

I cannot comment on the Sigma 12-24 f4.5-5.6 EX as I've never tried one, as I wasn't after a FF lens.

NB. These are my own experiences. I don't make comments based upon what reviews or others may say, they can do that for themselves.

Bottom line
Buy both the DA 12-24 and the DA 10-17!
They are quite different and suit completely different styles of photography.
Personally, I would start off with the DA 10-17 and see how you get on. If the need for a rectilinear street lens of super quality is obviously very important and you find your DA 16-45 (or 16-50) just doen't cut it for those wide shots, then the DA 12-24 is a winner.