This post goes along with "WHICH LENS SHOULD I CHOOSE?" I already posted a question similar to this, but now I am adding something else into the mix. I am still looking for the most versatility in my lens selections. I am still looking at the (sigma 2.8) 24-70mm (82mm filter) $484 and the 28-70mm (67mm filter) $329 in which I still can't decide. But I have found a NORMAL Canon EF 50mm 1.8 II Autofocus lense for $99. Would I be "overlapping" if I decided to get the cheaper sigma and this 1.8 or is it a good buy to have a 1.8 in my collection?? I am basically an amateur at this, but I want the most versatility for my money to take indoor basketball. Please help me make up my mind. Thanks!