Roccat Kone EMP Gaming Mouse @ techPowerUp
 

The Roccat Kone EMP is the successor to the Kone XTD, Roccat's ergo mouse for people who palm grip or have large hands. It's a high quality product with stunning performance, best-in-class sensor and well-rounded software for a reasonable price of $70.

http://www.techpowerup.com/reviews/ROCCAT/Kone_EMP/