Ditto talking to Ron at SVS. He'll steer you right. I have a PB2+ and love it. Your room is large and for a few hundred more you'll be more than happy.
All I can tell you is too initially had doubts buying something over the internet without local dealers. I bought a PB2+, FANTASTIC. See comments below: am so happy I made the choice and went with SVS, especially the PB2+. Initially in doubt about buying, albeit an outstanding rated product...