I owned the Seismic 10 and 12 both. hopefully you're getting a very good deal and are mostly interested in movies. lots of competition out there are their price-point. They seemed much more suited towards HT than music. I actually started with the 12, had disappointing results, and quickly moved to the 10 hoping for better integration with my music but never found the syncronism I was hoping for. They are true ball-busters for movies, thats for sure. In their defense, many reviewers think they are great subs for BOTH music and movies and if you are getting a killer deal, go for it!