Electric Bastionland has been the RPG I most want to run ever since I bought it years ago.
After watching a surreal Acid Western (which started out deceptively straightforward and veered endearingly off the rails by the final act), I'm itching to run In The Light of the Setting Sun: Bonanza Edition. But I'm at the end of my current FIST: Ultra Edition campaign and don't want to rush anything. :D
It's called Walker (1987). Directed by Alex Cox (Repo Man) and starring Ed Harris. Not currently streaming anywhere I know of, but if you can find it on DVD or something I highly recommend it. The less you know going in the better. :)