op
your playback designs unit is reputed to be excellent and it has a wealth of digital inputs... if you like how it sounds then just get a streamer
you can start with a bluesound nano with a 5v linear power supply - blu os is very easy to use and works very well - people here will no doubt suggest megabuck streamers... easy to spend someone else's money like water
you can start there and then decide if you like streaming, you might eventually want to try roon (which for me has been wonderful, even if it can be finicky at times)

