This week's DVD Tuesday is a tale of opposites: Juno, the indie comedy smash starring Ellen Page and written by blogging sensation Diablo Cody; the sci-fi sequel Aliens vs. Predator: Requiem, available in both standard and extra-bloody unrated editions; Lars and the Real Girl, Ryan Gosling's bittersweet comedy about a young man's love affair with a blow-up doll; and Before the Devil Knows You're Dead, starring Philip Seymour Hoffman and Ethan Hawke as two brothers whose plan to rob their parents' jewelry store goes horribly awry.