I'm in the market for getting some new lenses and am having some trouble with making up my mind on the shorter lens. I'm gonna be getting a Canon 1d mark II in the near future and am trying to determine what lens would be best. I've got it down to the 17-55 f2.8 http://www.adorama.com/CA1755.html and the 24-70 f2.8L http://www.bhphotovideo.com/bnh/con...304&is=USA&addedTroughType=categoryNavigation. I went to the camera shop today to look at the 17-55 and then got home today and realized its not an L series lens. Even though I was very impressed with it, I wonder what I would be sacrificing in not getting the L series. I mainly do photojournalism work. Does anyone have experience with these lenses that would be helpful in making my decision?