I was looking at the review of the new Canon 50D at dpreview.com. For all the talk of better high ISO performance the high ISO raw file samples from the 40D look much cleaner than those of the 50D (at the link below, scroll down). http://www.dpreview.com/reviews/canoneos50d/page18.asp Now I understand that higher res is supposed to cover some of that up because the enlargement factor is less, but man! there's a pretty big difference at ISO 800 and higher. In their conclusion they say the 40D beats the 50D in dynamic range and noise. I'm curious as to what this means for the 5D MkII. It's got almost twice the resolution as the 5D, but will that make up for the reduced photo receptor size. I'm going to be looking at it hard before spending my moola. I need clean high ISO performance more than I need high resolution. I may be happily sticking with the obsolete, price reduced 5D mkI.