Perixx PERIMICE-710B, 2.4GHz wireless mouse with high quality 1000 dpi and 1600 adjustable - Nano Receiver - 2 AAA batteries included Energizer - Black (Accessory)
Quite honestly, I did not find the correct wireless mouse at this price point. It is just great, small, accompanied by a nano-usb transmitter that will not take up space on your pc.
It is both very responsive regarding video games, very specific on SIM CITY or in different FPS. I highly recommend you, to my mind, it is the best at this price.