I use Volumio on Raspberry Pi 3 with HifiBerry. It is connected to Maranz DAC via optical cable. I am quite satisfied. I use Spotify as my music source. The Pi 3 part was quite cheap and Spotify monthly fee is affordable. I would be interested to use Tidal instead in order to get even better play back quality. I know I could do it by going Volumio Premium. Then I would loose possibility to listen music on the go using my phone and ear buds, because I don't want to pay for both Volumio Premium and Tidal. Regarding Spotify on Volumio there's an issue noted by many but never getting attendance by Volumio and Spotify teams. I presume either team should do the fix. The feature I'm after is gapless play and the issue is that it fails to work at least on my device. It is easily manifested by playing Dark Side of the Moon by Pink Floyd and ruins listening of quite a many classical music presentations.