Right now I'm playing Batman Arkham City and Skyrim with xBox 360 controller, since I am annoyed by clunky mouse movement. But probably for Diablo 3, I think I have to use mouse, so I wonder if a gaming mouse can improve the playability significantly compared to the generic logitec optical mouse that I have. If so, what mouse do you recommend? My budget is pretty low, let's say below $40.