Wow!!!! Really?! This is a world away better than the D800. I've used Nikon all my life, and I am officially impressed with the performance of the 5DM3. This is 25600 iso, sure you see some banding, but take a look at the D800 and D4, they are no where near this good. Wow. Bravo Canon. You've created a camera with a nice balance of mp, detail, color range, dynamic range and iso.