Yep ... me!
I brought 2x 40D's over the 50D's because the difference was minimal.
Low light performance is as good as it was but doesn't match the newer models now.
When I do upgrade (and it will be quite a while yet) I'll get something like the 5D Mkll to get that great low light performance and I'll keep 1 of the 40d's to suit the crop factor lens I have.
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