So I'm thinking of taking the plunge and investing in a 24-70 L. I think that I can really appreciate the extra speed of this lens when I'm shooting in low light (which is frequently). I really like the fact that it's a zoom - I've been debating on maybe getting a prime in this focal length range, but for my needs, this lens seems to be the most practical. My question is, in terms of image quality, will this lens be a (big) step up from my current EF-S 17-85 (mounted on a 40D)? Can you provide some images shot with the 24-70 L to solidify my decision? Help is appreciated.


- Alex