Hopefully you're not that tall....I dated a gal with an illegal apartment with 6' ceilings....I did have to watch out for the fire sprinkler heads and I'm only 5'10".
Probably not gereat for Atmos type setups but regular surround should work fine if you have good placement options.
Not a B&W fan of the 6 series myself, would look elsewhere. I wouldn't bother with an external amp to plug into the avr. I wouldn't ever buy Bose.