I'll be almost equally happy with any of them winning, but I'm pulling for Behind the Beautiful Forevers.
Its abstract mentions a few of these, but it is a very highly regarded book. Boo has won the Pulitzer and received the MacArthur "Genius" grant, the book won the National Book Award and it was a National Book Critics Circle Award Finalist. In addition it's also appeared on numerous best-of lists:
And here's another review of the book: