Honestly not sure on the prices of either the Q or the K-01 but I have another option for your boys...

I bought My stepson (9 years old) a *ist ds with a couple of lenses for about £110 about this time last year (he now has a manual 28 and a flash as part of his 'kit') and he loves it... The IQ is still very good and there's plenty of room for him to grow into it...

He started on green mode and currently experiments with Tv & Av when we go out...

He has also set up flash off-camera and taken some great self-portraits!!

I use Cactus V4 triggers with both Yongnuo-YN560 and Vivitar-285hv flashes...

Both my flashes are manual only (no P-TTL) but when using flash off-camera you're likely to be running whatever flash you own in manual mode anyway...

The Cactus triggers only have a central firing pin so can be used with pretty much any flash ever made (excluding Sony, who use a mental backwards hotshoe design)

I sometimes use the D-FA100 for portraits but it often depends on the space I'm shooting in... My house is small so it doesn't get used here...

I'll assume your friend has the 18-55 kit lens and you say you've given a fast fifty... So the lens I'd recomend is the 'Pentax-F 35-70mm' ... It's cheap, sharp and at a useful focal length for portrait. You should find one on the auction site for less than £40.

It also has a close focusing (macro, without really being macro) ability at the 70mm end that imo gives it a little bit more usefulness (or fun at least)

This...

Number 7 is amazing!!

There's some stunners from both of you in here!!

Both Venue & Registrar provisionally booked...

My pockets are getting lighter...

I'm thinking manstanox means that the MZ-7 is not reading the aperture of the lenses... (?)

Obvious thing to check but: Are the lenses set to the 'A' position?

The Sigma no doubt reads as it has no aperture ring so automatically sends info... I assume lenses with 'A' setting only send info when in 'A'.

Good hunting, it's a great lens... It'd take a 31mm Ltd for me to consider parting with mine...

Personally I found Picasa to be better and easier to use... But Lightroom is better than both...