Nice shoots. I see that you always have a bit of negative exposure compensation on your 7D. I guess this is to have a better representation of the real atmosphere rather than a correct exposure that shows something brighter than it was actually.

I'll do as you say, a bit high-speed high ISO and a bit of lower speed lower ISO. I think I prefer a bit of motion blur (can be very nice actually) and less noise. I don't expect big prints but rather web publication so I should be able to get away with ISO 1600 or perhaps even 3200. I don't mind having only 10% keepers or less so I'll probably spend more time with settings leading to better shots even though less of them.