25-40.....logitech makes good wireless "mice" if you can bump up a little bit, best buy just had an ad for the vx revolution (which i use) for like 60 i beleive. i love this mouse, laser, small usb reciever that fits in the mouse when not being used, 10 buttons in total! great mouse!
here is the link....it says only 7 buttons, but the mouse wheel scrolls to the right, left and down. i've got it set so that when i push down on the wheel an app closes, left moves back a page, and right moves forward a page....more like 10 on my config! lol