Help Needed Designing an "Amphitheater-Like" House

Hi Folks! It's been a while since I've been around... I obtained a modestly priced system a few years ago, and of course the dreaming and wondering continues. Anyway, I'm trying to design an amphitheater-like house (as if I would ever be able to afford it!) which employs angled walls and a special sloping, barreled ceiling. The design is an attempt to transform the Great Room (which encompasses the living room, dining room and kitchen) into a form not unlike the insides of a musical instrument. The idea is founded on eliminating hard 90 degree corners and such, BUT DOES reflect sound waves from back walls toward the listening area. Also, there is a balcony that I would hope would enjoy good sound from as well.
So, if sound waves are being reflected AT ALL, back toward the listening area; IS THIS A FLAWED DESIGN!? Does the use of room treatments strive to deaden such reflections from behind making this design unfeasible? Is the notion that the room being shaped sort of like a Russian Balalaika (a stringed instrument) a silly, unproductive use of my time? If anyone knows about such stuff, please respond. Thanks in advance. Your Friend, Mr. Stain