Currently an MX700... it isn't very precise (so turn down your sens) and it is heavy... BUT it never skips or hiccups, so you can count on it. That being said, it is not the ideal gaming mouse, but if you get used to it, you can still play damn well with it. It took me a while (weeks) to adapt to it, my previous mouse being the best damn ball mouse ever... (some light logitech)