I used to own Klipsch SW12 (sold recently). Have three subwoofers now including LFM1. Compare to SW12, LFM1 is much more tight controlled bass with less boominess. You will definitely feel the impact with this upgrade. Although I have not heard Hsu and Rocket subs but they all have excellent user reviews through out the forums. With proper placement, LFM1 is more than enough to satisfy bass need in small to medium size room and you can always add another LFM1 (or any other subs) if your room requires additional bass peformance. My experience with Outlaw customer service is second to none. Good luck with your purchase.