boxingscene.com used to be a great place to discuss boxing but lately half the first page is filled with hate threads, its all trolls there now. eastsideboxing.com is taking the same path, it seems a bit okay for now but the trolls are coming out of the woodwork, especially after the Pac-Cotto fight.
saddoboxing is tamed but not a lot of people go there
out of the 3 sites i mentioned, i would recommend saddoboxing. less trolls, less hating