Just jumping in here. Lots of good discussion in this thread.
I've been using a BR-20 as my DAC & Pre. Sound is GAME CHANGING.
I tried MM for a few weeks, but find the Bluesound interface much faster and easier to use from my phone. Phone app controls a Bluesound Node which happily delivers Qobuz up to 24/192 to the BR-20. For some services Bluesound doesn't support as well, Spotify + archived radio programs on Soundcloud or Mixcloud, a Sonos Port delivers those to the BR-20. Sonos controller app on phone, ipad is excellent though Port streaming caps out at 24/48. Again, being able to select the audio content from local, streaming, etc. from my phone then leverage the BR-20 as DAC and Pre has fantastic. This config also allows me to play same music in my other 7 home music zones. Also allows me to play those same albums while in the car, plane, vacation, etc. Qobuz supports download and offline playing up to 24/192. Use the lightning to _____ connector to avoid bluetooth in the signal path when outside the home...
Hope that is helpful to someone trying to cover all their use cases with highest possible sound quality.