Really what the measurements and size rating James. Curious if two of these will cut it in a 14x22x8 room with door openings vs the PB2000 PRO's? Probably your just getting louder lower extension with the 2000 series.
I am still in the review process with the 1000 Pros at the moment, and I haven't measured them yet so I can't give you a bassaholics room rating. I would say that whether they cut it or not in your room is a matter of your personal expectations. There are some people for whom two of these would be absolute overkill, and there are other people for whom it would be nowhere near enough SPL. They don't have the performance of the 2000 Pros, of course, but that is reasonable. I don't want to say a whole lot more since I don't want to spoil the review, and the review won't be published for a while, but you can find out whether they are enough pretty easily by just ordering one. If it suffices for you, good, and if it doesn't just arrange to return it, you don't stand to lose anything other than a little bit of time.