Novice trying to design a system for a loft

First off this is a great place. I have spent hours going through the forums and reviews. If I am duplicating, please give me a link.

I have about ten grand to spend, and already have the tv.
It is a loft with separate bedrooms with 12' walls. The ceiling is 15'

The main room is rectangular an is roughly 36'x 18'. The "space" allocated to the home theater is 15' x 15'

Again, I am oblivious. My goal is to get some components, that will stand the test of time. As technology changes, I will upgrade, but would like to have a few cornerstones.

Should I just get a baseline sysem, given the inherent sound of my situation?

I'd like an unabtrusive speaker system. I like the looks of the fpm from B & W.

What components would you suggest to make this work?

Thanks for reading this, and would appreciate your input.