While you're on the PKD kick, you could try watching Waking Life. It's a film where a variety of people talk about assorted subjects of existentialism, often with one hapless protagonist who seems to be living in a perpetual dream state where he awakens from one dream only to find himself in another. Definitely feels inspired by Philip K. Dick's writings. And Like A Scanner Darkly, it's completely rotoscoped. In fact...nevermind, it was made by the same guy, Richard Linklater.