Home theater design help


Recently I discovered that a wall I did not I think I could move is actually removeable and thus I can more than double my current home theater room into a much larger home theater/ media/ entertainment space. I engaged what dealers remain in my area but none seemed all that interesed or capable of managing design and construction changes especially since I have most of the equipment already. Anyone have any ideas on how to pursue this?  I roughly know what I want but also know there’s likely a lot I don’t know around design, sound tailoring, decorating, acoustics etc.   kind of at an impasse currently. Thanks! 
esthlos13
So the recommended book is on its way.  To note the bay window cutouts in the basement are not actual windows. It’s just the hexagonal half shape that breaks up a flat wall. The room and basement actually have no windows.  Do these forums let one upload pics?  Would be much easier to show the space and the questions I have around design 
16 x 33 is a beautiful size for stereo/theatre room!  Space to breathe and decorate. Lovely!! Don’t worry about “filling the room with sound”. A pair of 88db efficient speakers and a solid 200 watt amp will give all the sound sane people can use. Some will want powered subs. I haven’t and my speakers were about 5 db down at 32 hz. You could describe your room giving exact measurements starting from a corner. Call your viewing wall North. I’m interested. 
Hi PTSS-  when I have some time in the coming weeks I’ll get the dimensions written up. A picture is worth 1000 words here....

wrt your suggestions on speakers and equipment, I have almost everything already ( so the local stores weren’t really interested in helping me since I wouldn’t be buying much equipment ). The major addition with the room config change would be a front projector and screen but not an immediate requirement. I’d wire for I though or at least run wire conduit to make retro fitting simple. 

Equipment
middle Atlantic fan cooled rack
oppo bdp103
audiquest diamond hdmi to processor
marantz av8802a
(2) Lexicon Rx-7 amplifiers
revel ultima studio 2 (bi-amp) mains
revel ultima voice 2 (bi-amp) center
revel ultima gem 2 (side surround)
(4) revel c583 in ceiling atmos speakers
(2) JL Audio fathom f212v2 subs
tivo mini
jvc-hrs5900 svhs vcr
shunyata viper zitron power cables
audioquest slip 14/4 and 14/2 all around (had to be in wall rated)
panasonic vt-65 plasma
panamax pm-5300
3 dedicated 20 amp outlets for amps and processor/sources