There is a huge percision difference in 2000 and 3200. Set the mouse to 3200 and lower the sensitivity in game by a ton, and you will really get to see what a good mouse will do for you. As for the button things, I used to use a 7 button mouse, and I didn't really have much of a use for the other 2. It's not that big of a deal. As long as I have 5, I am happy =)