Don't know squat about DACs, but I'll just mention in passing that I bought a DEQX device for time coherence correction and room EQ, which has considerable DAC capabilities which I am still exploring. I think the DEQX DAC may have just bested the inboard DAC of my ARC Ref CD-8 CDP.
Check the thread, "Is DEQX a Game Changer?"
Check the thread, "Is DEQX a Game Changer?"