Which one do you prefer Stefan?

Well in the case of something like a flower I prefer a more subtle contrast transition, generally I think this suits the subject better.... not always the case though

Just my preference

Either 4 or 6 I think

Number 1 or 2, I agree with Mikew... I can't decide either

James,
it's also worth giving CaptureOne a try (30 days trial). I use the Pro version and find it capable of really dragging every last detail out of the RAW file.
It's worth noting that CaptureOne supports PEF better than DNG however.

Yes that is correct (same as mine).

Good to hear Charles.

Sarah, you're absolutely right that lower ISO doesn't necessarily mean a better image quality but it's a very good start .
I think the key really is to try and get the exposure as close to perfect in every shot, that way you maximise what is achievable at a given ISO setting.
Like Barry I tend to user Aperture priority mode (Av) and also I'm also now using TAv mode mode, this allows you to control both the aperture and shutter whilst the camera sets the ISO (within your defined limits) to maintain the correct exposure. Very useful

Looking forward to seeing some of your shots.

Welcome to the forum Tommy

A very warm welcome
I like and can strongly associate with your thought process... it's generally my approach to most things, I think (.... better double check :wink.

I think you will be very pleased with any the cameras you have mentioned. If you could stretch to secondhand K20D you'll feel you've hit the jack pot!