sigma 18-35mm f/1.8 aps-c lens

[ogrec]

dont buy sigma 17-70mm, i've shot with it and you're much better off getting canon 15-85mm or 17-50/17-55mm f/2.8 lens. 17-70 is not very sharp, not as fast as constant f/2.8 and doesnt have a range to compete with 15-85. only good thing about it is the low price tag.
edit: i didnt realize new version was released, disregard my comment

on topic: i remember the time when people were buying primes because they were faster and sharper then zooms... for anyone on aps-c this is like having 35 and 50mm prime constantly on their camera