Best digital format (non streaming)

And still the question (IF the 'raw material' is 'worthy' of high res processing/recording): where and how do I GET the high res file? I assume the streaming outlets only let you listen, but not SAVE the file. Likely, there are some (crazy expansive) specialty outlets that let you buy and download high res files? 

And only storage media will be computer/harddrive/USB/DVD-R/SSD? 

Or can I buy Dark Side of the Moon or Brothersin Arms in high res on physical media?

As a manufacturer, the transport and DAC still sound better than any streaming device we have tested.  It is close though and getting closer.  What we found for better sound quality is the equipment.  I can modify a transport (CDP) and DAC, but we have not ventured into a streamer at this time.  Upgrading the power supply in many components really helps the sound quality from our experience.  The benefit of having a streamer with all your recorded music is a big convenience though.

Happy Listening.

You can buy high resolution files from a lot of different places, I typically buy from HDtracks and Pro Studio Masters. Occasionally I also buy from Bandcamp. Between the three I can typically find what I am looking for.

CDs ripped and then played from a hard drive, connected to a dac with an s/pdif converter.  IMHO it would sound better than almost all transports connected to the same dac via coax.

Presto Classical doesn't off DSD but has a huge selection of other HiRes downloads.  HDTT is another site and they off DSD