yup, seconding, thirding and fourthing the vertical mice. Got an evoluent at home, cost me quite a bit, and then I got a cheaper yet highly rated lugulake, and the anker ones look good and are rated well.

Evoluent probably will have to come down in price now that there are more competing alternatives. Vertical mice solved my wrist and my coworkers' wrists' problems.

I'm on one from Evoluent as well (but as far as I know they updated it at least once since I got mine).

Wouldn't want to go back.