Logitech g400. Has back/forward buttons on the thumb side, but not symmetrical. Has a nice click to the mouse wheel and isn't restrictive(it's just a small metal wire hooked that bumps into grooves inside the mouse wheel)even if it's not 100% accurate, it's better than the ultra sensitive spongy mousewheel from the Microsoft comfort mouse I used before. Nice glide with the teflon pads, but no custom weights. It has DPI customization with default, +, and - precision buttons. The back and forward thumb buttons are programmable for games, but they are BACKWARDS for browsers. The button closer to the back of the mouse is the back button, but has the right arrow indicating "forward", and the opposite for the other button.
I spilled something on it. Even though I cleaned the parts and put it back together, the left click catches somewhere in the middle of the click as if it's rubbing against something.
These high DPI mice require all games to have mouse sensitivity at it's lowest setting, and then customizing the DPI through the mouse software.
Anyways, what really matters is how you use your mouse. Do you use the palm grip or the fingertip/claw grip? How big are these mice? How big is your hand? You may have to sacrifice the back/forward buttons on each side.
Anyways, here..
http://www.amazon.com/Microsoft-MGC-000 ... 0021Y73W6/and here.
http://www.amazon.com/Microsoft-Wireles ... B000EHUR3OOne more for good measure.
http://www.amazon.com/Logitech-Gaming-P ... B005EWB3AU