I prefer the option on the right where all seating is focused toward the tv. that would give you more space away from the surround speakers so they aren't right at one ear or the other if you're in the primary seating - the sofa.
My Theater room: 13x10, 92" screen, Epson 3500 projector on shelf, Onkyo Tx-SR504 in 6.1 mode, Klipsch Quintet iii speakers, Dayton 12" sub, Sony Blu-Ray/3D, Xbox 360
Family room: 46" Samsung 3D tv, Pioneer VSX-454 receiver, JBL ES20 speakers, Sony 3D Blu-Ray, Fire TV, Xbox 360, Wii
Future plans: better seating for the theater, possible upgrade to Atmos