I'm in the camp for equalization; you could run it through a tape loop to keep it out of the system on your best material. The best equalizer for listening to music IMHO is the old Cello Audio Pallette, which had settings designed to compensate for known recording companies' tendencies and made everything listenable as a result. The best one-box cure for bad CDs might be the most expensive, the Linn CD12, which is the best one-box player I've ever heard (it is good enough to compete with your EMM Labs equipment) and also the one that best got to the music rather than every minute detail. You could also try one of the earlier Audio Logic Model 34 DACs, before they went to the 2400 and the transformer-coupled versions (I believe that the current version also works well for ordinary CDs, but the earlier versions definitely let you flavor the sound a little more).