Well, this is pretty disappointing.
The discussion started out very well - and I thank most people for their helpful comments on advising me around some of the differences between different technical camera systems - after all, what's why I started the thread, I was more interested in talking about the different camera systems, lenses, etc - than digital backs.
Unfortunately, the discussion has been reduced to the rather childish and unhelpful position of "If you're not using the very latest most expensive CMOS sensor - you're wasting your time and money" and should give up immediately.
I can imagine if this was a forum for exotic cars - it's as though someone has gone out and bought a Bugatti Veyron and because it's the fastest by 10mph or so - everyone with a Ferrari or Lamborghini should now take their cars to a scrapyard, give up driving and take the bus.. That's what it sounds like reading some of the posts about CCD and CMOS based backs..
I see many people taking absolutely stunning images with CCD based backs on tech cameras, 99% of whom seem totally happy and at peace with the world... I come in here and I see people taking pictures of walls and charts, endlessly frustrated by something - I don't really understand.
It seems as though there are two different hobbies;
1 - Photography
2 - Collecting expensive gear.
Thanks for all your help guys, but that's all from me for now