All the best rooms I've heard were all regular rooms and not some special shape. Instead, what they did is make sure the speakers are set-up correctly and then used some judicious room tuning with bass traps in the corners and absorbers on all the walls. If done right the fabric of the room treatments can kinda fade into the room decore. The best room is your own and it must be functional, comftorable and pleasing to the eye. Otherwise, why would you want to stay in such a room. Besides, if you do not know what your doing I'd recommend getting in touch with a professional or at least consult with one and do your homework.
Best of luck and you are pretty lucky to have a dedicated room in the first place.
Best of luck and you are pretty lucky to have a dedicated room in the first place.