Ah the Mighty Mouse...
Its a bit ironic that apple are so s**t at making mice isnt it?
The Puck, the Mighty and now the Magic.. All worse than useless if you are doing anything other than sending emails and browsing the web.
To answer the OP I use a Logitech G9 - can't say enough good things about it!
Comes with 2 different, interchangeable grips. Braided, extra-long cord. Customisable weights to your likeing, Thumb buttons, 5000 DPI sensor, adjustable on the fly.
I never made a better computing purchase, and that includes my Mac Pro and Dell 2407 Ultrasharp!
Peace. x