I invested 19$ (Yeah I know a bit expensive) for a fUnc pad about 8 months ago, it's still workin great, never skips, and is still the #1 mousepad for most every FPS game.
http://www.fUnc.net there's also dkt pads, supermats, and steelpad's which also work well (I've tried all but dkt), but I still prefer my fUnc.
EDIT*
Here's a fUnc
Here's the Steelpad (Looks small, same size as func's surface)
Here's the dkt pad, slightly bigger than the func/sp by about 2"x2.5"