Hey fellas, would love to hear your thoughts, experiences, and recommendations on a new subwoofer from SVS. I just purchased new speakers from av123.com...I went with Piano Rosewood finished x-cs (mains and center) and x-ls (rears). They will be shipping next week...I can't wait! My current sub HAS to go! It's a JBL PB10...and it's okay, especially for being a sub that cost me under $175, nearly 7 years ago. My Theater Room / Living Room is 15'Wx30'D (approximately), and opens up on the left side for about 15' for a hallway and also the front entryway. Cieling is ~10'ft. So, as I'm thinking now...I would like to go with one of the following subs from SVS: 1. PB12-Plus/2 (~$1400 shipped - Overstock) 2. PB12-Plus (~$950 shipped - B Stock / Rosewood w/ slight small cracks) 3. PC-Ultra (~$1400 shipped) 4. PB13-Ultra (~$1500 shipped) If I were to buy right now, choosing only from the 3 that are available now, I would probably pick choice #1. If I were to wait, and I definitely can...I would probably pick choice #4...but ONLY if this new SVS PB13-Ultra will outperform the PB12-Plus/2...but if it won't...I'll just get it (the PB12-Plus/2) now! Your thoughts? Many thanks in advance!