Ok I have a little money to play with and want to change my lens line up. I currently have what's in my signature and just added a Canon 24mm f/2.8 and 30mm f/2 just because I'm a sucker for a good deal. I want to sell my Sigma 70-200 f/2.8 and go for the Canon with IS. While the Tamron 17-50 f/2.8 is ok im looking to upgrade that as well. What suggestions can you guys/gals make? I mostly shoot sports action shots, a lot of T&I and the occasional wedding.