I know you've already narrowed it down, but in my opinion, a cordless mouse works wonders. Until now, you couldn't have a (decent) mouse that had the best of both worlds: cordless and optical. Well, in my experience, the MS wireless intellimouse explorer fits the bill. It actually came out before the Logitech Dual optical, so it might (key word: might) have less of an advantage in the opt. department. However, compared to the cordless mouseman optical, this beats it hands down. While the Mouseman beats the Explorer in DPI (800 to 400), the Explorer takes more "pictures" per second (6000 to 2000). The pictures are more important. As you've seen, the Mouseman can't keep up in games, due to it being slow to track. Why, look! The Wireless Explorer is four times faster! If you don't want a cordless mouse, go with the dual optical.