I have tried 7.1 and heard 9.2, 11.4, ect lol and to me 5.1 {or 5.2 as in my system} is about the best you will get. Show me a system where they stretched the budget to 9.1 vs a nice 5.1 system the 5. is going to have better sound... 7. seems to take you out of the action, when the rears light they distract me from the material. Front center for dialog, front l and r for surround and front stage, and surr l and r for surround effect, any more and you just jumble everything to sh!t... IMO, but every body likes something different, so to each their own..