I wish Logitech would make a dual optical sensor, rf wireless, 800+dpi mouse that came in the old triangle three-button mouseman style (not the 'normal' round one, the triangle one molded to the hand).
I have a stock of 4 of these mice (but they're wired and ball mice) because they're just so kickass for everything, including gaming. The weight and feel of the ball is good, but mostly, the shape of the mouse is perfect -- it's exactly like the natural resting position for my hand. I, of course, overclock it.
But eventually my stock is gonna run out.. and then I'm gonna need a new mouse =(