I went from a G9 mouse(best mouse ever) which is a laser mouse to a Mad Catz Cyborg mmo7(optical) and absolutely hate it. basically if my subwoofer is turned up at all, the mouse drifts across the screens due to it picking up the vibrations. Trust me when I say DPI is not everything it is cracked out to be. Every so often, maybe once every 2 hours, I have to blow out the bottom of the mouse because a microscopic hair or dust catches the optical eye and it won't move.
My g9 was the most reliable mouse I've ever used, used it for 3 years 8 hours a day without problem, the optical I have I have daily problems with.
It is hard to say what is best.