What do you guys use? Im fighting MMA in a few months so I want something strong enough for striking. I want a dental implant mouthpiece (not a do-it-yourself kind) and I dont want a double sided one either. OPRO Mouthguards -- The World's Favourite Mouthguard seems to look like the best I can find Customguards.com - Protect Your Winning Smile seems to be about the same (just better known and more expensive) Are there any other brands I should be looking into? What do you guys wear, if anything?