Razer Deathadder like what was posted up above. I'm still figuring out the sweet spot for in-game sensitivity, but for the settings on the mouse I have it set to the lowest: 125hz polling rate (max 1000hz), 450 dpi (max 1800). I've been using crappy Microsoft mice for years as I always like the feel, but they would freak out and the cursor would fly all over the place about once every 10 minutes. The Deathadder has a very nice feel, and it has a kind of Batman look to the buttons with them flared out with nice finger grooves. Getting a new mouse was one of the best additions I could've made, as now I see why they make gamer mice. It's much easier to do a little field medicine with my bonesaw now. I've been sawing 2 heavies at a time, and I'm never looking back to the default setup.