I have just sold my 70-200 with the intent of getting a shorter zoom. My initial thought was 17-55 2.8 but the only thing that is holding me back would be the possibility of going full frame. But, I don't even know when of IF that will happen. I am just looking to get a little feedback from the people that use either. If you have the 24-70, do you wish you had more room on the short end?