[Smith David]

If you’re looking for an excellent, full-frame DSLR, the 5D Mk2 is very, very good. It’s at least 1 full F-stop more sensitive to light than my Canon 1DS Mk2. A setting of ASA 800 or 1000 yields about the same noise level as my older camera at ASA 400. It’s autofocus system is very fast and accurate on single shot mode.
The new LCD screen is gorgeous. 3″ diagonal with 900,000+ pixels. It’s possibly the best quality LCD screen ever put on a DSLR. The menus are easier to understand and navigate than the 1DS Mk2’s menus. “Live View” is an excellent way to do critical focusing.
-Full frame = Real wide angle. My 17-40 lens can now work as it’s supposed to.
-High ISO with amazing quality. The noise level at ISO 12800 (H1) in 5D ~= ISO 1250-1600 in 40D.
-High quality LCD with a light sensor, so no need to adjust LCD brightness from time to time. It’s neat.
Autofocus microadjustment by lens.