As far as not sharing a room, how many people have 2 dedicated rooms? I know some do but it's got to be a pretty small number. I, for one, am thrilled to have ONE dedicated room. If I just had a 2-channel system in there I would have to put the "home theater" (I hate that term) in one of my living spaces. None of mine would accommodate a 100" screen, not even close. Then there's the fact that because this system is not in a dedicated room the SQ will suffer. As I previously stated, my favorite use of my room/system is watching concert videos. I'm getting the best sound possible for this purpose in my "dual use" room.
If I had unlimited funds and could build any kind of house I wanted I "might" do 2 rooms, but I also might not. I like having the highest quality gear in my dual use room that I can afford. Having 2 rooms would be somewhat redundant, especially since a screen has become such an important component in the enjoyment of my room.
For the absolute best 2 channel listening I have a dedicated headphone system. This equipment is at least as good as the rest, probably better. HifiMan Susvara 'phones and a Holo Audio stack consisting of a May KTE DAC and a Bliss KTE amp. The SQ is sublime. Both systems share the HifiRose RS130 as a streaming source and a fairly highly modified Oppo 203 with I2S output as a physical disc source.
I've spent decades planning this room/systems and wrestling with all the decisions that are involved. Considering that most plans don't work out exactly as you'd like and some real world learning is often necessary, I've been over-the-moon with the results I've been getting. I can't afford to shuffle components at the level that many of you do (though I've definitely done quite a bit of shuffling with the HP rig over the years), so I had to get it as right as I could from the beginning.