If it were only up to me, I'd tell him to start making them! Unfortunately, the wife already thinks the current setup, though way better than what it replaced, is plenty loud (and I'm often told to turn it down). I know I want to upgrade the sub, I'm already at 75-80% volume at the back for HT and I want more oompf but I'm afraid to fry it again. The EP175 is the best sub I've ever had but I'm wondering if a sealed EP500 would be crisper.
I really need to make a trip to Axiom this year when I'm up at the cottage (only 13km away!) to listen to a side by side comparison of the M22 vs M80 and a demo of the EP500 vs EP175 so I hear the differences.