i wouldnt get the kind wand uses.... but it might be worth it for the recovery times try Chucks......
i trust Doctor Shock. don't know many others by brand name. you could always go with the boxing brands: everlast, etc.
well since i got braces i used a Modifyed No Boil Mouth Piece and It works really well for BJJ,Kickboxing and MMA..
There are a couple of existing threads talking about the OPro and Bite Me mouthguards. Go take a look there. I bought a $5 Shock Doctor mouthguard to hold me over until my Bite Me arrives and the Shock Doctor one tore the hell out of my gums. Not really sure how or why either.
Biteme for sure. Use the search function there are detailed discussions and the top two (by consensus) are Opro and Biteme. I own an opro but wish I had spent a little more ad gotten the Biteme.