The forum already uses its own hashing method, IIRC its 10,000 rounds of RIPEMD160 with a unique salt per user. This is as safe as it gets.
RIPEND160 is good and I think SHA-2 family is good too. I think bcrypt was suggested because it has a large time cost for each hash generated, which makes brute force attacks against any given password an infeasible proposition.
-MZ