Ok so heres my review of the razer copperhead.
The main features of this mouse are under the hood. THe 2k dpi engine is amazing, and it's very fluid. I couldn't use 1600 dpi on my old mouse, but 2k dpi on this is fairly easy to get used too. The left and right mouse buttons are very comfortable. The shape isn't the most ergonomic ever, but it's still pretty comfortable after using it for a day or two. I feel a little more under control with this mouse. Teflon feet have almost no friction at all. This was the best mouse on the market before habu. Habu looks to be mroe ergonomic for right handers, and offers some new features for relatively the same price. I would have gone for the habu, but i didn't wanna wait and get it off the net, so i got this copperhead. If your a lefty then this is a definate choice.