I don't know Power Sound, at all, but I use Rythmik subs which would be another good choice IMO. Per Tgrisham, both HSU and SVS have an excellent reputation, as well.
As a side note, whichever sub you choose, your goal will require a x-over point higher than many 'philes choose. The tight thump from a kick drum (I assume that's a fair bit of what you're after) is centered around 50 - 60 hz, so you'll want to cross the subs in comfortably above that point. I'd recommend 80 hz to start.
As a side note, whichever sub you choose, your goal will require a x-over point higher than many 'philes choose. The tight thump from a kick drum (I assume that's a fair bit of what you're after) is centered around 50 - 60 hz, so you'll want to cross the subs in comfortably above that point. I'd recommend 80 hz to start.