Hsu subs are extremely responsive but, in my experience, can get a bit boomy and thus may be better for HT than audio. RELs, unless you go to the big ones, are a little dynamically shy for HT. If you are watching Das Boot and listening to a REL, when the rivets blow out you're impressed. If you are listening to a Hsu (or either of the brands listed below), when the rivets blow out you jump out of your chair and duck on the floor. That being said, REL subs are extremely musical and famous for mating easily with the mains.
For dual use at not too much cost, you might want to consider the Paradigm Servo 15, as suggested earlier, or the VMPS subs.
will
For dual use at not too much cost, you might want to consider the Paradigm Servo 15, as suggested earlier, or the VMPS subs.
will