Can't help you with any actual experience, but the design of the Dayton, a small sealed box, suggests that it will not play as loud or as deep as the larger vented SVS and Hsu. Generally speaking, loud and deep is more important for HT than it is for music. In addition, certain music lovers swear by sealed box designs for a "tighter" (more accurate?) bass. It's subjective though.
I tried to start a similar thread some time ago, but could not find anyone to post about the Titanic. I ended up getting a killer deal on the Outlaw LFM-1, so it kind of made my decision for me.