I tried Tidal super duper hi def. I couldn't hear a difference compared to Spotify Premium.

I couldn't stand the Tidal UI.

There is no "preferred" sound mode. Tidal, Spotify, etc are all streamed in stereo. When I had passives, I frequently switched to PLII and Neo. With the actives, it's almost always stereo.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated