I'm going to be buying a 350D body within the next few weeks and selling off my G6. I narrowed it down to: One of these to as my general lens: Canon EF 28-135mm f/3.5-5.6 IS USM Canon EF-S 17-85 f/4-5.6 IS USM Tamron 28-75mm f/2.8 XR Di IF Sigma 28-70mm f/2.8 EX Aspherical DF And one of these for the sports photography I'm going to be taking this upcoming semester: Canon EF 70-200m f/4L USM Sigma AF 70-200mm f/2.8 EX APO HSM The Canon 28-135 seems too slow but yet reviews say that this is a good everyday lens to keep on all the time. The Canon 17-85 has a lot of complaints about CA but like the 28-135, a good everyday lens. The only thing I could see myself picking one of these over the Sigma or Tamron is for IS. Does it really matter? If not then I'm thinking about getting the Tamron 28-75mm f/2.8 and the Sigma 70-200mm f/2.8. The Tamron looks like a solid lens and it's sold out on some sites, and a good price also. It would be nice to own an L lens but that f/4 doesn't seem like it's going to cut it for something like...night time outdoor sports or indoor sports. The reviews on the Sigma 70-200 look good so far as well. Anyone try using the 70-200m f/4 with indoor sports or something similar? Thoughts? Also, what's a good tripod? I haven't even bothered looking around for that.