John Carpenter's They Live is one of the best paranoid sci-fi/action movies ever. If you have never seen it, stop reading this and go watch it NOW! Don't worry, I'll still be here when you get back.
Back? Now, wasn't that awesome? For those who don't wanna get away from their computers, check out the scene below, surely the greatest fight scene ever filmed.
Now that you've done that, may I suggest getting this fine score by John Carpenter and Alan Howarth?