What to Rent. Fill out a form and this site generates movie rental advice. If you've seen the film you click a button that generates another option. Here's my list of recommended films and how far I had to go to get to one I hadn't seen:

Being John Malkovich
Punch Drunk Love
Raging Bull
Magnolia
The Man Who Wasn't There
What's Eating Gilbert Grape
Cradle Will Rock

Hmmm.... seems reasonable. This site would inspire more confidence if they spelled "Scorsese" correctly in the survey (and avoided the expression "When you lay down at night to go to sleep...."--though I note that Ratso Rizzo memorably says "I wanna lay down" in "Midnight Cowboy," so maybe that's movie talk).