I have the "C" setup and i love it ! the 24-70 is really sharp, down side of it is that is heavy and is a bit big for me for travel. I use my 10-22 and a 17-40 when i travel but I have been thinking of selling the 17-40 to get the 17-55 because of the f4.0 limits me at low light...


In other words, i know is a hard decision because like you I also have a cropped body and I have to think twice when buying lenses.