Logitech G500's a sweet wired mouse with minimal frills. Variable weighting and tracking sensitivity too.
This. Had this mouse for years and it's beginning to crap out on me. Not the mouse's fault though, my dog thought the cord looked tasty. I've long considered an MMO mouse for a while, like the Naga. I've heard mixed things on Razer products though. Logitech has an MMO mouse too but I haven't beard anything about it.