Don't bother with the branded "gaming mice" they are insanely overpriced (they just slap the word "gaming" on it so it costs more). If you want an excellent, mid-priced mouse for gaming (especially Diablo 3) go with a Logitech G400. For the money it costs it is really a killer deal, it is very reliable, sturdy, made for intense clicking has DPI switching, and as most do 2 side buttons. Also the scroll wheel isn't the "free spin" kind, it clicks so it's even suitable for FPS games or other that require precise scrolling. http://www.amazon.co...33479720&sr=8-1
I actually bought G400 2 days ago and so far I'm really happy about it.