No gaming mouse here, I just use whatever cheap generic mice I can find. My philosophy is (and it generally holds true) that it's not the tool, it's the user. I mean, I think I'm using a Dell laser mouse I found at a PC Recycling center, and I'm almost always 3:1 kdr regardless of the game I play.
Maybe using better mice ups your game a bit, but it can't be much. And it's all purely psychological, because the technology is basically the same regardless of the mouse you use.