DO NOT get the Corsair M45. It has an automatic DPI switching bug that Corsair never cared to fix. Not all implementations of 3310 are good.
Source : I have owned Razer DeathAdder 3.5, Steelseries Kana CS:GO Edition, Steelseries Diablo 3 Edition, Corsair M45, Razer DeathAdder 2013, Razer...