This is one of the best MMO gaming mice hands down. The ease of the buttons on the side make playing an MMO easy.
SCIMITAR ELITE WIRELESS MMO Gaming Mouse
This is the wired version of the other Scimitar that I have listed. I prefer the wireless for ease of movement, but if you want a cheaper version this is the one for you!
SCIMITAR RGB ELITE Optical MOBA/MMO Gaming Mouse
For all of your FPS gamers out there. This is one of the best mice you can get for an FPS game!
M65 RGB ULTRA WIRELESS Tunable FPS Gaming Mouse
Keyboard
I might be biased because these are purple, but THEY ARE SO PRETTY.