If size is not an issue, go with the PB12-NSD. It will play lower than the SB12 Plus and you will save $100 over the SB12+ The PB12 is a ported sub, vs the SB12 is sealed. That being said, I have the SB12+ and love it. I needed to have the higher WAF, so I went with the SB12+. I find that the SB12+ is great for music, and good for HT. You should email SVS with your room volume, layout, and needs (music vs. HT) and they will help point you to the right sub. Don't worry, they won't over sell you! Their customer service before and after the sale is EXCELLENT.