As someone else has mentioned -- you're thinking of spending thousands on a new streamer and you're using internet radio and Spotify as your sources?
Qobuz starts at $11 a month and everything is CD quality or better - tons of hi-rez material. Tidal starts at the same price (but charges a bit more for the hi-rez plan.)
If you're nervous about spending over $6K on a new streamer, why don't you first try out one of the better streaming services and see what that does for your sound quality. Just a thought....