My home theater actually had very little input from me. The contractors that installed it did their way, which was fine.
I've only changed one thing, I painted the upper portion of the walls from cream to asphalt grey, which cut down on the side wall glare.
I asked the contractor last year why...
I could never go smaller. If I had the extra bucks, I'd increase my screen size to a 140", the max my front wall will hold...to hell with HDR.
Don't the higher end JVCs do HDR very well?
Here is my SPARKSPLEX HT. Entry way thru the garage to the theater. Theater is 12' x 17' x 9' and it was built in 2011. This is my film room, as I call it.