So, I'm thinking of picking up a few classic movie posters to decorate my apartment with. So far, I think the french poster for Once Upon A Time In The West looks pretty sweet.

Could anyone recommend some other posters, particularly a group of posters that go well together? Extra points for black-and-white or minimal color.

Or... do you have a favorite movie poster (not necessarily a poster for you favorite movie, but based upon the artistic merit of the poster alone)? Discuss.