"Hi-end" and Spotify don't really go together in my mind. Spotify is nice for background music.
Roon is your best bet for high quality sound and a great interface. I am controlling three rooms with Roon. I haven't however tried to play the same thing on all three at the same time so can't speak to how well it syncs up when all are playing. It does have a "group" control, so I assume it can play to all three, or two at a time.
Roon can play radio stations like Radio Paradise and can also create "radio" from your sources - Tidal, Qobuz, your server if you want background music.
Unless you're really stuck on Spotify, give Roon a look.
Roon is your best bet for high quality sound and a great interface. I am controlling three rooms with Roon. I haven't however tried to play the same thing on all three at the same time so can't speak to how well it syncs up when all are playing. It does have a "group" control, so I assume it can play to all three, or two at a time.
Roon can play radio stations like Radio Paradise and can also create "radio" from your sources - Tidal, Qobuz, your server if you want background music.
Unless you're really stuck on Spotify, give Roon a look.