I'd like to see your list! I know I felt a little out of place, since most of my favorites are less than 50 years old... ;)
New
LOTR (given...and I still don't have the DVD)
Stalingrad
The Usual Suspects
Snatch
A Bridge Too Far (the 4 hour version)
No Man's Land
The Matrix
Old
The Sands of Iwo Jima
Paths of Glory
The Searchers
True Grit
The Manchurian Candidate
Manner Gegen Panzer (Men Against Tanks)
All Quiet on the Western Front (B&W)
Twelve Angry Men
Ben Hur
Don't get me started on comedies...