Roon would be decisive for me. Roon adds greatly to the experience and I've found no better way to discover new music. Like everything in this hobby, it's subjective and not for everyone but having been a Roon user for a couple of years I'd hate to be without it. Otherwise either would be a good choice.
Aurender A20 or Lumin X1
I considering one of these as my next DAC/streamer. From a purely technical perspective, which one should I buy?