Roccat Kone XTD Mouse Review @ OCIA.net
 

Roccat has already established themselves as a solid manufacturer and designer of performance gaming peripherals and accessories. The Roccat Kone XTD is the next release in their line of performance gaming mice. This unit retails for around $90 USD and features eight fully programmable mouse buttons, a tracking sensor that scales up to 8200 DPI and a custom weight system that allows you to change the weight of the mouse in your hand in five gram increments.

http://www.ocia.net/reviews/roccatxtd/page1.shtml