Thanks for the advice!
I still can't decide whether I want to protect my lower teeth, or breathe properly.
I'm considering either:
Shock Doctor Gel Max Mouthguard from Title Boxing
or
Brain-Pad Pro+ Plus High Performance Mouthguard from Title Boxing
I was also thinking of this one, but the Low Profile design would seem to be inadequate in protecting the roots of the teeth.
Brain-Pad Lo Pro+ Plus Mouthguard from Title Boxing
Which one??