Long story short, I've been listening with the K701 (and sometimes the Grado SR225, ER-4P and M50s) and right now, I actually prefer the M-Stage over the Ming Da.
Should I just return or sell the Ming Da or should I try to tube-roll? I'm using JJ Tesla EL84's right now (freebie from Pacific Valve). All the other tubes are stock. Should I keep the Ming Da and experiement with tubes or maybe I'm just a solid-state kind of person?