Ray.Petri wrote in post #6394715
...I was never over-impressed with my 40D IQ and when I saw the results of the450D I felt the 450D had an IQ adventage - Just a feeling perhaps but the extra few MPix were making a difference. ...
I had the exact same impression. I upgraded mainly for live view and maybe my expectations were set too high, but I was expecting that a xxD camera would have offered at least a marginal improvement over the xxxD body I had at the time.
Ray.Petri wrote in post #6394715
However, there seems more to this upgrade than MPix alone. Faster AF - Better LCD - Better ISO noise and the ability to micro adjust lens focus. Is that worth £1000+?
That was the main reason I upgraded to the 40, features and that is again the reason I'm upgrading to the 50D. I really need microfocus adjustment for my 100-400. It's just a little off and Canon can not get it any closer. It's been back a couple of time. It's close, but I can see it in nearly every picture and it buggs me.