This is one I think about often. I know some movies you just can't top, but then there are some that I'd love to see interpreted through today's techniques.
One I would love to see remade is Since You Went Away with Claudette Colbert, Jennifer Jones and Shirley Temple. It would be a great one if it were still about World War Two, but I also wonder would it would look like if it were about the war in Iraq. Its a great story that I think could carry throughout the generations very well.
Possibly one of the first things to make me think of this was when I saw Home of the Brave and thou