@ctsooner
I think we have different expectations.
Personally, if I am paying for an excellent DAC it needs to be more or less immune to source quality. I've found some DAC's do this much better than others.
Schiit and Mytek for instance to me seem more immune than the Ayre QB-9 and possibly the Codex and Oppo. I find Mac Mini's to have presented the worst sound I've ever heard, taking down otherwise excellent DAC's, like the QB-9, down. Your mileage may vary and it's been a while since I had a chance to do exhaustive comparisons, but this is what my experience leads me to believe. In particular, listen for evidence of a harsh, or etched quality to the treble.
I consider DAC's which are "revealing" of power cables, digital cables or upstream sources (within reason) far less desirable than a DAC that performs consistently well.
Of course, not all feel that way, and please enjoy yourself your way. My point to this reply was just to explain where I'm coming from, and that I must remain in disagreement with the philosophy that an excellent DAC is revealing of the source components. I feel it's the opposite.
Best,
Erik