It seems like fps will be a low priority issue for Mark.
Even with limitless fps I'd recommend shooting in bursts of three to five, unless you're trying to put together a series of something like a biker jumping a log, or a skateboard trick, etc., then you might press the button down and hold it for a second or so. That's pretty rare in sports and wildlife. (I did a series of a deer jumping a fence once).
ISO 800 is child's play with the 5D2. Think more like 3200 and 6400 and you'll be liberated. Still, as shown above, the 7D is no slouch at ISO 6400.