I just did the measurement conversions, and realized we have about the same size rooms. Mine is 24'x15' but with an 8' ceiling all the way across. I went long instead of wide, because of window locations. Look forward to seeing yours.

Marantz SR7010
DIY HTPC
M60 x2
RP-450C
QS8 x2
QS10 x2
M2 x4
EP600
Samsung QN90A 85"