Musically I'm probably ok with the SW12. I like symphony, swing, bigband, dixieland. Not into electric bass much. I have noticed the canon shots on Telarc's 1812 get badly distorted, but that's probably not a good indication of sub (or amp---Marantz SR7000) performance. Main problem is movie explosions sometimes sound hollow or cutoff, deep bass of space ship motors, etc., lose clean rythmic throb and turn into low confused sound. In the new room I have the sub behind a couch firing parallel to a wall. I haven't played with corner locations yet. If I do decide to upgrade I'd want to be sure it is a noticable improvement, not an incremental one.