avoid wireless mouse for gaming. if you're into intense gaming for a long time, wire mouse are the better choice. the last thing you want is the sensitivity to change when the mouse start losing power. after using alot of wireless mouse for gaming, all i can say is screw wireless mouse.
for me, i would go for Logitech Gaming Mouse G500, but that's just me. it has adjustable weights, as well as multiple buttons to hotkeys. great for fps.
to me, if it is not cordless, has 4 button + a wheel scrolling mouse, good respond time, with adjustable sensitivity, is automatically a good mouse. the adjustable weight is just preference, i personally enjoy it.
in any case, you can't really go wrong with razor mouse, they have good products.
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