I visit the IMP Awards pretty often since it's such a great source for movie posters, and because they get posters from different markets, not just the typically lesser American ones.
At the moment they have voting open for you to choose the best movie posters from all 83 Oscar winners. I'm telling you about this because West Side Story (1961) is not in their top ten at this current voting tally and that is yo-yo, schoolboy... KRUP YOU, voters!* You'd think that this would be the one type of voting where the most recent movies wouldn't automatically win from familiarity because it's a visual marketing opinion, not a "which movie is your favorite?" question.
The famous poster conveys two things that you'd think wouldn't go together. It gives us the gritty edge of inner city stories and the transcendent power of the musical genre and it manages both in perfect harmony. It's just Reason #100,721,009 that Saul Bass was a buggin' ever lovin'* genius. I have the West Side Story poster framed on my wall right next to the All About My Mother poster as they're maybe my two favorite posters of all time.
Go vote... and tell us what you selected in the comments.
*Creative profanity courtesy of the immortal West Side Story, the 50th anniversary of which we'll celebrate this coming October.