Dick and Heinlein remind me of each other sometimes in their bizarre plot points, but Dick is more inclined towards distopianism, I think. A few years ago, I would've said he was Orwellian, but that was when I was a young idiot and all I knew of Orwell was 1984.

Incidentally, what do you think of Christopher Hitchens? He's rapidly becoming one of my favorite intellectuals.