Well as of now the longest lens I have is a 28-90mm f/4-5.6 and I plan on shooting some school sports so I need to get a new longer and better lens. My price limit is about $1,000 and since ill be shooting sports I need about a f/2.8 or something with IS. Right now I have the canon 70-200mm f/4.0L, 70-200mm f/2.8L, or the 200mm f/2.8L in mind. The only thing is the 70-200mm f/2.8 is a little out of my price range, the 70-200mm f/4.0 is kind of slow and I wont be able to move around a lot so I don't want the 200mm f/2.8. Is there and tamron or sigma alternatives I can buy? Or maybe a cheaper canon lens that can do what I want?