thank you to all that replied
the mx518 is the mouse i will most likely go with.
ign points out 1 factor:
"My second gripe is that there isn't a "quick switch" option. Personally, I'd like to use only two settings, one high-speed and one low-speed. It would be nice if you could assign one button to flip between your settings, which in my case would cause it to switch back and forth. Instead, I need to use both buttons to toggle between two settings. This is the part that might be fixable via software, and I hope it is"
has this been fixed with a driver or software update????
also the lowest price i found this for was $40 bucks...can i get it any cheaper somewhere else?
thanks