" the acoustic nightmare most of those rooms must be. More reflective surfaces than a solar thermal farm."
"Beyond hideous, a lot of these."
Last quote lifted from 1st page of the posts.
My thoughts are the same, looking beyond the actual rigs.
Most any design speaker IF allowed can be positioned to sound pretty good in those rooms. Mine is a cross between the first 2(rustic, actual living space, 100+ year craftsmanship-lots of wood/plaster and lots of windows-SQ nightmare)
Those setups however, likely would sound even more convincing in room #3 which appears to be a thought out dedicated space.
If it were my place- Studer playing a recording of early Beatles/Stones LIVE in #2 with proper beverage in hand
Imagining swingin in Franks era, you do the built in not too far from the bar.