HardwareZone had a first look at Razer's Copperhead mouse. Here's a short snip from their review:

For your information, the Razer Diamondback is currently touted as the best gaming mouse by top competitive gamers and it has swept many awards from both online and print publications. However, the buck doesn't stop there as company has outdone itself yet again to produce a high-end gaming mouse that seemed to break all barriers.



Link: HardwareZone