I agree with sirquack about the 350v3 vs the 500. I first received the 350v3, very awesome sub, let alone a great price for it. Then a couple of months later I added an EP500. The 350 was no slouch in my 3400 cf room. I wanted to add the EP500 for a smoother response with a dual sub setup, take advantage of the dsp addition, plus having a lower extension. Either way it's a win win situation for you.

2 = M60,4 = QS8's,1 = VP150,1 = EP350,1 = EP500
HK247
Optoma HD70,110" DIY screen
Xbox360 & PS3