I got a Logitech G500 and it is really good! . Check some of its features;
Gaming-grade laser gives you precision at any speed
Up to 27 grams of extra weight give you the feel you want in your hand
Onboard memory lets you take your settings with you
Dual mode scroll wheel provides click-to-click or hyper-fast scrolling
On-the-fly adjustable DPI gives you the right level of precision for any game scenario. (200~5700 dpi)
Mouse also comes with 10 programmable buttons