I so agree on Rear Window. Grace Kelly is the most beautiful woman ever, and the suspense generated by filming almost exclusively in James Stewart's claustrophobic apartment was brilliant. I love Hitchcock!

I also love Requiem for a Dream, but it's not one you watch if you require a happy ending. Coincidentally, Requiem was made by the same director as my unknown movie candidate, Pi.

Godfather 1&2 are also high on my list, as is Silence of the Lambs

"Shoot, a fella could have a pretty good weekend in Vegas with all that stuff"