Logitech G402, and if you can afford the extra $20 get the 502, it's a lot more mouse for only a little more money, the 502 has a 12000dpi sensor, 11 buttons, 1mhz polling, custom weights, software allows custom resolutions, custom lighting, custom surface tuning, and the scroll wheel has a clutch that enables free spinning. I only use 10000dpi on mine as 12000 is a little fast.