Alright,
1: I'm a realtor, real estate investor, and home builder.
2: The house is a 1.5 story home and the media room is located above the main living area, it is cheap footage to build. We call them bonus rooms because of this.
3: Bonus rooms above main living areas cost a fraction of what the actual main living area square footage costs to build.
4: Bonus rooms are typically worth less than what actual living area is worth.
5: A finished media room makes a bonus rooms value on par or above normal living footage value.
By my estimates having the room finished with a projector, screen, seating, etc the room as a working media room is probably worth to the right buyer about 60 dollars PSF more than if it were just bonus footage.
The room is roughly 750 SF which means about a 45,000 difference.
All that being said I have spoken with Dennis and I'm getting some of his affordable accuracy speakers for up there, I believe they will do perfect.