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