
Razer Ouroboros for me.
Reason is simple, this is the only available wireless gaming mouse that is usable for lefties or both hands.
http://www.pcworld.c...ice-lovers.html
Mapping:

1: group 1
2: group 5
3: group 4
4: group 2
5: group 3
8: heat vision
9: night vision
11: dpi/profile switch
rest unused
I have group 4 on the right button and not group 2 so you can use the little indicators around the crosshair for left/right builds.