I have that Performance mouse and I like it. Don't care for the wireless mice and having to switch out the batteries every week and having a spot to put the wireless receiver. Wired mouse are alot cheaper and never have any problems with a wireless connection.
I have to change my vote, I picked up the Microsoft Sidewinder mouse from BB and it is amazing! Feels great in your hands, the buttons are actually accessible, DPI-on-the-fly, and pretty good software.