Yup i agree with mohitmukheja comment about these mice issue, i personally think that FPS gamers only need a mice that capable of 400 to 800 dpi. We have alot of Competition gaming grade mice in the market but only few mouse are able to give you the comfort and confidence. I personally recomended intelli gaming mouse and logitech. I have razer death adder and logitech G7 but i prever old-school gaming mice such as MX310,MX500,MX518 coz with them i'm able to won quite a number of CS competition in asia.