I'd like to get an opinion from anyone who has purchased a refurb sub. My Velodyne DEQ-15R conked out the other day and I'm looking at a refurb EP600 as a replacement. I have M60's for fronts and Paradigms for a center and surrounds and run everything off a Marantz SR7008. The description says the sub is "good" and Axiom advised that everything is good as new as far as the sound goes. Does anyone have any thoughts?