Another great alternative is HiFiBerry which produce their own DACs and cases that you can add a Raspberry Pi to.
Personally I have a RPi4 with the DAC2 HD and a steel case which I’m very happy with.
I think you can run Volumio on these too, but I prefer the simpler HiFiBerry OS distribution. You get AirPlay 2, Spotify and many more ways to play music. All connected to your analog hi-if equipment.