I'm looking to upgrade my circa 2000 Phase Technology Octave Power 10 sub. I'm trying to decide between the SVS SB1000 and PB1000. My AVR is a Denon 1913, mains are Polk Monitor 5's (old too but sound great), center is Polk CS10 and surrounds are OMW3. We use the system solely to watch movies. Our living room is approx 12' x 14'. My only concern with the Phase Tech sub is that it tends to sound boomy and muddy at times, presumably because it only has a 100W amp and is ported. Another thing I've noticed is that due to the small room size sometimes I can "hear" the sub. Meaning I can tell the lows are coming from the sub's location. Because of this I have it sitting between the mains beside the TV to balance the lows better. I've read many posts about the pros and cons of sealed vs ported and it seems most feel that ported is best for movies. I'm wondering, however, in my case with such a small room would I be better off with the SB1000? Or would the build quality of the PB1000 be such that it would not have these issues? I certainly don't want to end up with less bass but from the specs I would think either of these units would blow my old one away. Any advice would be greatly appreciated.