Right now I am using a Canon EOS 400D and I am finding the urge to upgrade to the 40D. The reasons are because of the following: The new autofocus of the 40D, I am finding that with my current camera the camera focuses on the background a lot in action shots and thus the subject is blurry. The 400D has less than stellar ISO performance at ISO 800 and above, and that is quite limiting because I find that I am in lower light situations a lot. I've heard that the 40D has outstanding ISO performance and that even at 1600 it is not that bad. I would find the 6.5 FPS a lot handier for the wildlife photos I take because even at 3 FPS I sometimes miss a shot. The EOS 400D isn't really that comfortable to hold for me and the 40D looks like it will feel better in my hands and it is better built. Any insight would be greatly appreciated, thanks in advance!