Rabrant, what size sub you should get depends on how big your room is. I have the PB12-ISD in a 12x13 room and it is far more than enough for my needs. The PB10 is pretty new. If it had been available at the time, I probably would have gone with it since it's significantly cheaper and my room isn't very large.

Regardless, you really can't go wrong with either SVS or Hsu subwoofers.