When you said "well recorded and mastered stuff", I took it as compression that isn't added by the hand of the mastering engineer.
I assure you there is no harshness in the DCC CDs, and there wasn't any harshness in the Esoteric gear with them either. I just don't think the Esoteric players I have heard, sound natural tonally even with reference level CDs.
The DCC CDs were made in the 90s. However the music on his current label- Audio Fidelity sounds just as good as those 90s CDs and they were released between 2005- present day.