I use the 7D with the 70-300L (a wonderful lens) for sports (daytime) and the 15-85 for everything else. The 15-85 is an excellent general purpose lens...and it's the one I take on vacation. I also use it for getting photos and video on the sideline of High School and Pop Warner football games...shots that I couldn't get on the 7D with the 70-300. The f3.5 really hasn't been that bad for me and, with the 7D's excellent noise handling (RAW), I'm really happy with the combo. Sure, the 15-85 doesn't blow me away like the 70-300L does...but, that's an L lens thing I guess.