Lots of bad advice here from peeps who haven't owned any of the kit or bothered to read the spec sheets. The DQ uses a lower quality output stage than the Mdac which uses the Cross output stage. The CDQ uses a lower quality psu arrangement with lower spec parts than the Mdac, they had issues with the Original transformer vendor for the CDQ and subsequently offered the new transformer and OLED display as an upgrade to owners of the CDQ. If you need analogue throughput today then the CDQ is the best option. If you can wait for John to make the Mdac PSU with analogue throughput option then that would be the highest quality option in the long run. You might be waiting six month for that tO materialise though.
The mdac is the best specced and most current design out of the three. Which you prefer, of you can tell them apart at all is another matter entirely.
Kuzma Stabi/S 12", (LP12-bastard) DC motor and optical tacho psu, Benz LP, Paradise (phonostage). MB-Pro, Brooklyn dac and psu, Bruno Putzeys balanced pre, mod86p dual mono amps, Yamaha NS1000m