I' m an avid gamer. FPS' mainly.
Been playing CS 1.6 for 4 years now.
I'd recommend these mice in different price range, since u havent declared urs:
Under 2K: Logi MX 518, SS Kinzu
2k-3k: Razer DA, Razer Copperhead, MS Intelli 3.0
Over 3k : SS Ikari Laser, SS Xai
I have used MX, DA...