I have pounded the dickens out of BG suits, surfing and caving, and the only thing I have ever managed to damage was the overall appearance. Those things are tough. Why would you want something thicker than 7mm? Water that cold deserves a drysuit (I'm a wimp when it comes to cold water.)
The thing I like best about Bare, besides they hold up to a lot of abuse, is their wide range of sizes. I lucked out a couple of years back and found a new 7mm farmer John (fits like a glove) for $100 (guy was going around buying out closed dives shops and selling the inventory off on line.) That suit has seen a lot of cave mud and rocks and it is still going strong (and it still looks fairly good after a strong pressure washing.)