Rythmik LV12R came out today.. I also found this.. Should I jump on this deal?!
Boston Acoustics US)
Link doesn't show any products, but if we're comparing Boston Acoustics to the likes of Rythmik, Outlaw, HSU and PSA, I'd say pass on the Boston Acoustics subwoofer. Honestly, any of the three original subs you mentioned will likely suit you well, and add the PSA XV15 to that recommendation as well. I think you'll be quite happy with any of those four.
I saw you mentioned dual subs, which I think is the most ideal approach for most situations. If you can afford it go for it.
