I built this home theater back in the good old days when I was a single 'stock option' guy. The room is 13 1/2 feet by 23 feet and 7'/8' vaulted ceiling.
Display: JVC DLA-G11 projector, 123" Stewart Luxus Deluxe screenwall Grayhawk screen
Audio: Lexicon DC-2 processor, (2) Sherbourn 5/1500a amplifiers, B&W 804 speakers for front LR and rear LR, B&W HTM for center, Boston Acoustics VRMX for side LR, Velodyne F1500 subwoofer
Sources: Toshiba HD-A2 DVD player, Brighthouse HD cable box, XBox 360
Control: Xantech wired IR receiver on the front wall, junction box, emitters on the individual components, Inline Inc IN3504 component video switch
The front wall and ceiling are painted flat black. The side and back walls are painted neutral medium gray. The carpet is medium gray. The furniture is black leather with rosewood trim.
The acoustics in the room are really bad so I have ordered acoustic panels (and bass traps) from ATSAcoustics.com and ReadyAcoustics.com to hopefully address that situation.
My next upgrade will be a 1080P projector (probably the Epson Home Cinema 1080P UB).
Edit: Photos of the new acoustic panels that I just installed: