Those Retropolis posters feel sort of perfect for those old flicks, it has that grandeur and deco style we expect that wasn't actually THERE the first time, if that makes sense.  They feel like the idealized versions of our memories instead of the genuine article, which is great, since we build things up in our minds like that.  They're all very cool, I would love some of those on my wall (I'm digging the Gigantor poster, even though I'm not a big T-28 fan).