Since you are streaming Tidal Hi-FI through Audirvana I would recommend a DAC that can handle MQA. The Mytek Brooklyn is probably the best overall (for the price) but if you just want to get your feet wet you could try an Audioquest Dragonfly Red or Meridian Explorer2 DAC and either return them or keep one for travel or a smaller system (I have the Explorer2 hooked to a MacBook Air and powered speakers in a secondary office).
If you like the sound but want to move up you could try the Project Pre Box S2 Digital or the new NAD C658.
If you like the sound but want to move up you could try the Project Pre Box S2 Digital or the new NAD C658.