Hi!
I have a Canon XTi and currently have use of an (canon film) 70-300 lens, plus I own the kit lens and Tamron 17-50.
My little brother plays highschool football and I can shoot from the sidelines, I'd like to get the best shots I can as this is his senior year then he's off to play college ball.
I'm purchasing a 580 exII and want to have the best lens to complement it for outdoor stadiums within reason. Last year I was shooting with the 70-300 handheld and it was a disaster, naturally. I got a few keepers but nothing tack sharp.
My local camera store told me that with the flash the 70-300 would be sufficient, but I'd like a good zoom to use for portraits as well. So that being considered, what would you recommend? I'd appreciate a budget choice and a mid-range choice (I can't afford the 70-200 2.8 IS!)
My budget is flexible, but I'd like to get the best bang for my buck because I'm a hobbiest (and not a rich one) 


