But re the OP's post, he might consider the Panny GH1 as there are adaptors to use Nikkor lenses and my understanding is that it's more of hybrid and more video user friendly than what Nikon & Canon have to offer so far. AFAIK & FWIW the D700s (or x) will probably have 1080P. If you have the time, just wait for the next iteration. If you've got the bucks, get a D3s and make your videos.
720p vs 1080p video quality 720p#
720P is HD broadcast quality, and frankly, it'll still take a lot of computer power to process. One of the secrets to buying an affordable HD TV set is to buy 720P for any set 42" or smaller. Seriously: in a screen of 42" or smaller, the difference between 1080P and 720P is indistinguishable. You won't even notice it in your camera bag next to your D3x If you really want 1080p, buy yourself a a sanyo HD-2000 for $500. Some people do make professional videos using them, but in general they use them for special situation or just to prove they can. Video on a pro DSLR is IMHO a gimmick (for now). Then again, if you are panning the rolling shutter on these cams will give you a "jellocam" effect on some shots. I'm not sure if canon offers IS mode 2 in their wide angle zooms. You then need to find IS/VR lenses that detect or allow you to turn off stabilization in the direction you are panning. Try holding your camera away from your face (so you can see the LCD) for an extended period of time. That makes hand-holding them even harder. You can't use the viewfinder, you have to use the LCD. The ergonomics make that hard to do compared to a regular videocam (either a consumer hand held or professional shoulder mount). Are you planning to handhold these beasts for video?