i'll challenge you to a game of CoD:MW2 - well, ok, maybe counterstrike 1.6 on my current rig.
you should also see my keyboard. i'm not done yet making it fast, but i already spend a lot less time than average with my right hand on the mouse.
Discussion
When I switched to a trackball is when my headshot percentage went up in CS. It got to where people accused me of cheating constantly.
oh, trackball. not trackpad. yes, i would like a good one of those, but they are hard to find the actual good, gaming ones, with the big heavy accurate ball. easier to put them right next to the keyboard and reduce the right arm lateral motion required for my programming work.