Don't go for Razer Naga if you don't spend 100% of your playing time playing only poosh button MMO's. Deathadder or Logitech 500. Simply because of the fact they are actually useful for other games too! These feel so good and Naga can be rather small, if you have a large hand. Though you can configure Naga but it is VERY overpriced for what you're gonna get. Whatever floats your... ehh... boat?
For below poster:
I use a Naga myself.