Got a chance to pick up a barely used ABM 500 seriesI head for approx $525 w/ a partial trade. Can't decide if I should just wait for a EVO II used, which I've rarely seen, or anty-up & pay $899 new. From what I've read from other TBrs there's not that much difference in the 2. Would like some feedback ASAP. It's going to be driving either an A/groove Tri 210 or a Berg 322!! Thanks!