The 7D is a good camera. I know there was a comparison test between the the canon cameras, nikon, panasonic VS 35mm film from Kodak and Fuji.
If I were going to get a HD camera for doco's, I would very very seriously consider the Canon 5D/7D. We just shot a complete corporate video on the 5D and it was AMAZING!!
Previously I had used the JVC GY series of cameras at 720p...but the amount of stuffing around turned me off film making for a while.
The Canon cameras have reignited the fire. The quality (1080p @ 24fps), the lens choice and cost of glass(L series 17-40mm is around $1000 Au - AWESOME), solid state recording and my favorite...portability! It's so easy to use, pack up, store and take care of.
I have attached the link to the film vs SLR test. Check it out.
http://vimeo.com/11080239
Christian
