Pentax is keeping a ranking with the colours link
ranking so far.
1. white - black
2. navy - black
3. silver - black
4. red - black
5. chocolate - black

10. black - black

So everyone saying they want black are just old fashion, but considering the average age of the members of this forum we can't blame you

The DA50-200 is shorter though but i don't think there is much between them, certainly not when the DA50-200 is at 200mm and the DA55-300 at 200mm. I believe you would throw away your money with buying a DA50-200 for a single event.
If the lens is at 200mm and you're 10 metres away, do you think 10cm in length would make a difference?

If you're concerned by low light and want something in that range I would go for a better lens like the DA*50-135 f/2.8 or Sigma/Tamron 70-200 f/2.8, they are expensive though and bigger but they would at least give you better image quality and the ability to shoot in low light.

Like Ken said a wider lens might be a better buy since you don't have one beside your kit lens.
DA16-45 f/4 is a very good lens or if you can buy the 16-50 f/2.8 or tamron 17-50 f/2.8 you can do some low light too.
17-70mm lenses are also very handy since they cover a very wide range (group photos to portrait) sigma and pentax have both their own versions.

It's all up to you what you want and need though, if you want the DA50-200 no one is stopping you. Simply giving honest and open opining here

Sorry Amin but can not find it any more

You can look up for some paper test and see how Epson does, they are pretty good.
I would just buy the pack since they are quite a bit cheaper then the ilford and try them out and use them if you like them.

Need to be going soon (birthday) will info you a bit more if i can later.

You have the DA55-300 that one is considered best lens in that range so no need to buy one of the above since they won't be better.

Not really weird though, they are both different devices and work in different ways.

CCD is an active sensor where CMOS is passive, that's why CMOS is better for longer shutter speed since they don't heat up that much. CMOS sensors are also more responsive so they work better then CCD with high iso but with low ISO a signal travels through less components with CCD then with CMOS resulting in less noise (not 110% sure on that though).

CCD are still the best sensors in my eyes but CMOS is better at iso800 and everybody seems to be focus how well a camera preforms at high iso but forget how they preform at low iso and dynamic range.

Also now that we see film on DSLR camera we wont see CCD back on there since they get hot when using for a long time, CMOS keep far cooler since they are passive.

Here is a link if you want to read more about it link

Colour cast is... a shade of colour over the photo, Had some mahor problems with that when printing out-source very cheaply, there is a colour shade(cast) over the whole photo.
To be honest that was not the truly problem with the Canon profile, just they way the handle the reds nothing more.

The Ilford, epson, canon, option didn't came up randomly but searched on the net for experience about them.
Already had bought a Canon iP4500 but was not sure about the paper.
Out test the Epson Glossy photo, the simple 4 star one came out on top of all the others even better then the more expensive 5 star prenium papers from epson.
When seraching I found a forum where someone was getting good results on epson paper with Ilford inkjet glossy profiles so tried it out and it works good for me at least.

Will try to look it up, they guy tested several kind of papers and profiles if I remember correctly.

Too bad isn't it, silver looks quite good
Maybe silver might come if it sells good in Japan...

Do you know if you can chose the grip colour in the EU or are they all fixed?

Yes you're right Amin but you did understand me though

Not many other printers have the Fine Art as profile, don't know why not though.
You could try to see how the Gallery heavy matt profile works on the fine art paper instead of using the canon one.
Simply print a small image with both profiles and compare.

I'm now using the ilford profiles on Epson paper with a Canon printer and the results are good so far as I can tell.
With the canon profiles i always had a colour cast, red was the problem so far as I can remember.

The K-7 has a solution to this problem, it analyse the light that hits the AF sensor and adjust it so the camera should focus just as fine under tungsten as under day-light.

Maybe worth an upgrade Mike?

Just a thought though but you're probable comparing the K20D with your K10D.
The K20D use a CMOS sensor and it produce slightly more noise with lower ISO (ASA) then a CCD sensor what the K10D use, at ISO 400+ is the turning point I believe.