So my JBL PSW-D112 amp fried after 3 years...pretty good for those I understand...and I'm looking to replace. I looked at the new JBL model, the PB12, but they have just awful awful reviews on quality, so they are out. I am looking to spend sub $300 shipped. The Polk PSW350 is intriguing and I can get it for about $227 shipped. I read on these boards about the Dayton. Is it actually a good sub? Only like $130 shipped. Any other ideas or opinions? Also, I have the Sony STR-DB930 Receiver and it is 110W+110W in stereo and 250W+250W dynamic at 4OHms: Is there a certain power subwoofer that I should shoot for? 100, 150, 250, 300 W?