Wassup Jordan! I too have a dilemma. I need to find another lens to
compliment my 70-200 f2.8 IS. I was leaning towards the EF-S 17-55 f/2.8.. I was looking into the 24-105 f/4. The only down side to the EF-S is that for the price......it's not an "L" lens. Let me know what you decide. If you decide to get the 17-55........let us know how it is!