I owned a K-03X, which, as you probably know, is two generations back from Esoteric's current K-03XD. The K-03X has an excellent transport, but the DAC imparted a too defined, often bright, edgy sound through my Gryphon integrated/Magico S3 MkII setup. I did a comparison with a dealer loaned T+A MP player (not sure the model, but it was their then current HV series). Slightly smoother but similar sound. Not enough of an upgrade to get me interested. I upgraded to the Esoteric K-01XD last year. Totally different in-house designed DAC - different ball game.