I've used Foobar and Jriver via PC, and Runeaudio via Raspberry pi and they've all worked great for FLAC to DAC playback.
As I read more about digital audio, I realize that people who are writing about raspberry pi integration (Darko, audiostream) are using Volumio and not Runeaudio as firmware.
I realize that there are obvious issues in confusing Rune and Roon, but other than that is there a clear reason to choose Volumio over Runeaudio firmware?