I could make it work with phpBB, the problem is not the particular software, it's the database migration.  The migrator for every board software that I've tried crashes before it can initialize any type of migration.  The only exception was bbpress.  I've also seen many recent abandonments of vBulletin because of their new price structure.  The best example would be Scan New England-I had hoped for a seamless transfer like theirs..