If you're asking which room to use I'd use the basement or the second room. If you don't mind building a room in the basement that would be my pick. That's exactly what I did here. The best thing about it is I used soundboard, resilient channel then drywall then acoustic tiles on the ceiling. This helps isolate you from the rest of the house. I can play my stereo quite loudly without bothering the two women upstairs. Get some bass traps and treat at least all the first reflection points and you'll have a very nice listening room.
Having a sloped ceiling like room number two is good but at 55" is awfully low. The other two rooms are too small unless you listen to low levels and treat it well. Room acoustics/treatment is well worth the money and is a better investment than upgrading electronics.
Having a sloped ceiling like room number two is good but at 55" is awfully low. The other two rooms are too small unless you listen to low levels and treat it well. Room acoustics/treatment is well worth the money and is a better investment than upgrading electronics.