Seeing you mention River of No Return reminded me there is no Marilyn Monroe on Blu-ray. In addition to the already mentioned River and The Seven Year Itch, how about There's No Business Like Show Business (its lush color and stereophonic sound would be just right for Blu-ray), Bus Stop, Some Like It Hot, and Gentlemen Prefer Blondes. Yes, I know we're getting All About Eve in February, but How to Marry a Millionaire just cries out for high definition.