Small dedicated listening rooms

Thanks. Going to hear some Harbeth’s and some Sonus Faber in the next week or so. Will be seeking out the other suggestions as well. Thanks for the input.

" Potentially downsizing from a 17’ x 22’ room to a 8’6 x 10’ room. "
A nice pair of Sennheiser HD800S is what you need.

Closet indeed. Don't waste your time and $$$ trying to shoehorn a high end system in there. Do what has been proposed and invest in a very nice headphone rig. 15k wil go a long way in this situation.

Oz

I would consider Omega speakers and a quality set amp, perhaps even  LTA microzotl, in a very near field setup. Save you lots of dough too.

Duke brings up some very good points. Adding multiple small subs is beneficial, as it will smooth out the overall response. Unfortunately, adding more subs brings its own problems...and that is getting them to blend invisibly into the mix. Not to say it cannot be done, as I have managed this in my room, but it is more difficult to achieve and will take a lot more effort...and patience.
I wouldn't go with the headphone suggestions...no need to.
Since the room measures well and has a high ceiling, I think you are fine.