I hate to say it but given the room size and from what I just learned from conversations I had with SVS about my own large room, I would go for the 2 SVS PB10-ISD without hesitation. Having 2 subs in a room that size provides some huge opportunities for tweaking to your exact seating position etc.

I'm also not convinced that the new Axiom subs match up with SVS or HSU for that matter..... Now before anyone fly's off the handle, keep in mind what I just said. I'm sure the new Axiom subs are nice. Are they SVS or HSU nice at the same price level? I have yet to see or hear anything that would make me say yes to that question.