Gentoo. Not an Arch fork, and uses OpenRC by default. I use it and love it. Portage is the best package manager out there, imo.

You can still get binaries of the really annoying things to compile, like Firefox. Otherwise, it’s all source-based.

I’d advise installing it in a VM or on a spare computer first to get your hands around what it is.

In your case, you’ll want to specify the following flags in you makefile:

OpenRC, -systemd

You’ll add a bunch of others in there too depending on architecture and personal priorities.

Follow the handbook. https://www.gentoo.org/get-started/

There’s also Calculate Linux, which is basically Gentoo with a graphical front end, but I think it’s Intel only. CLI is more fun anyway.

If I want the highest quality streaming, then Amazon Music.

Otherwise, things I’ve purchased in 96khz or 192khz from ProStudioMasters.com

I work in the audio post industry, so I’m generally listening on my work rig either through Genelec speakers or Beyer DT880 Pro headphones, fed by a UA Apollo audio interface.