I thought of doing the same thing but with a 1D III and shooting in the lowest sRAW setting so I can increase the shooting time. The only problem is with a fast card what is the logest time I can shoot? If someone on this forum would be so kind that has a 1D III to shoot a test that would be awesome!
That might (remotely) make me sell some lenses (keeping the 600mm of course!) and my 60D to fund a 1D III.
As far as sound is concerned I don't like the built in audio very at all (being a audio file) I would get a seperate recording solution.
John.