About local files, couple of distinctions in my setup as to why local files sounds superior to those being streamed from Qobuz/Tidal:
1) No network noise and latency due to files being played from internal SSD storage of N30SA.
2) 95% of stored files are digitized from analog tapes and direct DSD.
IME, Tidal/Qobuz files are a mixed bag due to unknown provenance of files. There are some really stellar sounding files and then there are some that are simply unlistenable (to me). Not to mention, variables in our home network and equipments rendering the final sound. If one thing I learned with digital streaming is this, there is no streaming components at any price point out there that sounds optimal right out of the box without tweaking the home network.