Hi I am looking at buying either an SVS PB12-Plus/2 rated at 900WRMS or the Axiom EP500 v2 rated at 500WRMS. I can get either subwoofer for the same price since the SVS is a runout model. Would I be fair is saying that the SVS would be far better value for money. Has anyone compared the two or are they not a fair comparison. Should the SVS be compared to the Axiom EP800?