Recommend me a new mouse!

[Chesspiece_face]

I never updated this to report I've been using Sanwa MA-TB39 trackballs for a couple years. Sanwa work much better for me than the M570.

I'm still using the same G400 as when the thread was started.

I cracked about two years ago and bought the Logitech Wireless M510. I didn't like any of the wired options that were appearing on the market and this one kept closest to the form factor of the G400. I was a bit wary as I can't count the amount of times I've been playing games with friends only to hear "Crap! My mouse is dead!", but after two years using this mouse I haven't had to replace the batteries once. (They advertise a 2-year battery life, and I can verify that this holds up under pretty heavy use.)

This is definitely my new standard for usable mice.