I purchased the Razer Naga mouse and was just posting this for any gamers out there that might possibly be looking for a new mouse.
Pros: The mouse is insanely responsive. It has not lagged one time since I have been using it. It has 17 buttons on it that can be programmed for anything. Obviously this mouse is ideal for people who play MMO's and have characters with multiple abilities. The mouse flat out looks awesome.
Cons: The price is a little more than most are probably looking to spend on a mouse. The learning curve is a little steeper. (There is an ideal position to always have your hand in. More buttons = More learning)
All in all, it is an amazing purchase for gamers. Especially MMO players. It takes a little longer to get used to, but it is well worth it.