I'm looking at getting a 85 1.8 for shooting basketball in a poorly lit gym. But is it really gonna make enough difference from a 2.8 lens to the 1.8? So if I were shooting 1/250, how much faster could I shoot? I know I would like to go for the 1.4 when it comes to getting the fastest lens, but price difference won't cut it. I thought about 135 f2, but again huge price difference. I know there are some basketball shooters in here, any suggestions and/or tips...I'm thinking now of using the 70-200 2.8, underexposing alittle for speed, and pulling out in PP.