in2deep. I have no idea where you live, but around me there are at least 4 electronics stores that do aftermarket repairs for units. Are you sure that the amp itself is totally shot? or is it just that it needs the CAP's replaced and some genneral maintenance to get the amp back up and running?

You need to understand from Axiom's point of view, the unit is well outside of a warranty period and they are in the business of selling new equipment. They are selling a new amp as the rest of the unit it working, and from that you get a 5 year warranty. But if they cost is just too much, then getting the broken amp repaired though a 3rd party is a viable option. I'd call around and see if getting it fixed is worth the cost. Then that would answer part of your question.

I have the EP500 v4 and it's a sealed unit unlike yours, I think they have moved forward in the design of the units and only you can tell if your find the need for the extra low frequency sounds.

Anthem: AVM60, Fosi DAC-Q5
Axiom: ADA1500, LFR1100 Actiive, QS8, EP500, M3, M3comp, M5