Does 2 buttons include the mousewheel button as a button. Unless your a die hard Mac person you need more than 2. Plus a lot of people couldn't care less about the mac, and may want the extra buttons in their control scheme.
5 buttons are pretty much the norm these days on the PC, with the back and forwards ones you use with the thumb as well as the mouse wheel and all that.
5 buttons are pretty much the norm these days on the PC, with the back and forwards ones you use with the thumb as well as the mouse wheel and all that.