Here's a few of pictures of my 7'1" high room, 80" under the soffits, 9' 5" wide and 28.5' long theater I am working on. 54x96" horizontally masked SMX AT screen, Barco 1209S pj, two big subs, and two rows of loveseats going in (Sear's Matrix series). I am using up seven feet of the total length for front and rear AT spaces. They'll visually square up the room, hide the speakers and all amps, plus eliminate the "bowling alley feel to the room.
The black area in the rear photo on the left hand side, is the av closet. 6' of av rack there. You can also make out the long cold air return difuser in the ceiling. There's an eight foot long, double walled and GG'ed cold air return hidden in the ceiling joist area above it.
The room will be finished low key art deco. The plan is to play up the ceiling, play down the walls, and keep the room as uncluttered as possible. The ceiling will be getting anaglypta wallpaper and finished in a dark metallic purple. The plywood strip on the ceiling is to create a reveal, then crown moulding. Walls will be simple vertical bevelled edge GOM fabric panels. The room will get two columns in the rear, one to hide the HVAC penetration into the room and up into the soffit and a matching one on the opposite wall that will be hinged to get access to a window buried in the soffit. The small amount of wood trim in the room and columns are going to be zebrawood. Lighting is four sconces, six in ceiling spots and two step lights and I am looking into up soffit lighting. A GE 3104 will housed in the "HVAC" column.
This is revision number four of this space so I thought "future proofing". The lower wall kick trim area is getting boxed inwards with two conduits in it, running front AT space to rear AT space. Combined with the front and rear AT spaces, any future cabling needs are simple to accomodate. The carpet will run up the wall about 6" as kicktrim and have a wood cap before the fabric panels start. We've finally settled on Kane Jaguar for the carpet.
Another future proof idea built into the room is a section of that rear soffit was built for easy and quick removal for a long throw digital pj.
There's a sand filled stage (5' of room depth) behind the AT screen wall. Jury is still out on whether I want a visual stage in front of the AT wall. I am leaning towards none.
At this stage, I can say the two real compromises I made, are being forced to do an island style riser and being ok with seating for four.