I upgraded from a 50D to the 7D. Very stable, much easier to use. AND audio! To think a filmmaker could buy a $400 body and get this kind of quality is fantastic. Too bad so many are misguided in the trade-offs between 8-bit 4K and 14-bit RAW. Anyway, MLV Producer is amazing. I can't get over how good it is. It deals with my EOS-M's focus dots and does all the correction I'd want in the 7D RAW files.
http://youtu.be/2gYiOiltsyw