I built one in my home... its now disassembled however. Soundproofed the room as well. It was fun while it lasted. I could still set it up again, I have been meaning to for a few months now but it's been working great as a secondary storage room for the last couple years
It was purely built to seat one, I had one armchair in there. All the speakers were positioned to that seat. It was beautiful. This makes me want to do it all over again. Will post pics if I get around to it sometime soonish. Looking to pick up some more bookshelf speakers this boxing day.
Good luck with the build! It gets expensive but every little bit is worth it.
BTW I think someone mentioned it before me, but buy everything independently (doesn't have to be same brand) to your liking. MAKE SURE you impedance match for maximum power transfer to the speakers to get the most out of your amp(s). HTIB is good to start off with, until you realize you want more.