HELP - Building stereo room, need advice ASAP


I am building a new house with a dedicated stereo room which will be built to IsoRoom standards with ASC room treatments, the room was originally to be built to be 9x14.5x23.3 feet (golden ratio). Based on some design constraints, that will not happen :(

My other options are the following and I need advice to settle on the preferred alternative room size. My preference I think would be # 2 below, please advise ASAP. Whether it matters, my speakers are Revel Studio2's (the small brother of the Salons).

1) 8 x 12.9 x 20.7 ft (golden ratio)
2) 9 x 14.75 x 20 ft
3) 8 x 14.75 x 20 ft
solecky
Seems like you already have things well in hand with your stated standard and room treatments. Building the larger space, option two would allow for future speaker changes and add to the airiness of the room if nothing else. You have before you a great opportunity, live the the dream!
#2 biggest room volume you can manage. keep speakers well away from walls and listen quasi nearfield.
OP,

all rooms sizes as above will be fine. Do not forget about dedicated line(s) to your new listening room.

Happy Listening!