Hey guys...I've been dealing with some family health issues so I haven't hooked up the ARC yet and haven't really used the HT for quite some time. All of that being said, I love the subwoofer. I plan on adding a 2nd one in the next 12 months, just because I want to, not because I have to. If you are an Audiophile, you may want to spend the extra money on a Rhythmik or the like, but I wouldn't be able to tell the difference, and the Rhythmik would be wasted money. I was watching the Star Trek reboot and the sub shook my center channel off my Bell'O TV stand. Only a broken grill post thankfully. For the money, you can't go wrong. I have a huge space and the one 15 does a hell of a job. The second one will be for overkill. I'm not a basshead, so take that into account. I can listen to Norah Jones or 2 Live Crew and you get great clean bass regardless. Movies do great also.
I guess the best review I can give is that it's a no regret purchase, not one bit.