Some options for October:

Buried (opens later this month but with a wide release the second week of October)
The Social Network (October 1)
It's Kind of a Funny Story (October 8)
Hereafter (October 22)

I couldn't make it through the first ten pages of Funny Story. I was going to read Hereafter recently, but then I saw the shoddy-ass trailer and haven't had the guts to. Buried and The Social Network are left then. I read both, and there's a novelty to each of them that makes them enticing, but I think there's more to talk about with The Social Network than Buried. However, I'm game for whatever so . . . ?