Another nice thing about the Zacspeed chest protector is that they work well with a Leatt brace. It's a pretty good unit. I can also recommend the Acerbis Koerta. It's a full set of armor - chest and full spine protector along with elbow guards and kidney belt, AND it was designed to work with a Leatt brace as well. I prefer the Acerbis myself, I find it to be less bulky... But, it's your money! Spend it wherever you like. Either choice will be fine.
