@drmuso, I do not understand why you found the "Infigo AudioHigh end playlist” and that nothing came up under "Hi-Fi Audio Partners”. The good news is that you found the Infigo playlist.
While I agree some of the songs are CD quality and others are hi-res, I like the variety of music. Many of these artists I have never heard of before. I also agree that the high-res albums on QoBuz have excellent sound quality.
Another search option is you can go to QoBuz’s playlists and search on hi-res. You should find some playlists that contain all hi-res tracks. You might also search on hi-res in the main QoBuz search bar for additional hi-res albums.