Before you get too caught up in blowing 1500-2000 dollars on a new sub, I would seriously ride out the process with Axiom. If I read your other thread correctly, this sub is still under warranty and Axiom's doing what they can to get it working.
I've had about a half-dozen service issues with Axiom over 10+ years, even with speakers bought on closeout from a brick-and-mortar shop. Every one of the issues was resolved quickly and with nothing but the utmost courtesy. They stand behind their product 100%, and by all accounts the EP500 is dynamite.
Life is *still* worth living without a functioning subwoofer for another few weeks.
