Bluesound node has digital in via USB and optical, and I believe it can read a NAS or USB drive directly without a computer. You can use that as a streamer and go RCA out to a fancy HP amplifier or just use the built-in HP amplifier on the node. If you’re willing to invest more money, you can go with a computer with Roon on it which will let you manage your NAS files and streaming (from Qobuz or Tidal) in the same interface. This will let you also access all that music on the go as well. Maybe as a next step upgrade down the line… :)