I still think it would be easiest to have TWO forums. One for the BS, and let that grow as it needs to, and NOT index, or put it to the search.Then have a separate forum, which is searchable, for those topics which are more aimed at people who are specifically looking for information.
I know I would be daunted by the number of messages which don't pertain to music, if that was why I was coming here for the first time.
Max, Joe, etc? What are the chances of having two message forum bases?