Well they should, considering they are over 3x the price.
Yes, it costs 3 times as much as the BIC, Polk and Klipsch subs that are always posted on SD, but it is easily worth that. A subwoofer with this kind of of impact and detail will become the backbone of your home theater system. If you're coming from these $200-300 subs, it totally changes the mood of your movie watching.
There's way bigger and more expensive stuff in the subwoofer world that you can graduate to, but it's already a huge leap going from a $250 BIC to one of these things.