By the way, I'm starting to reach that age where I realize that pretty much every story has been told before. For example, The Departed was actually a remake of a Hong Kong thriller called Infernal Affairs. I'm actually looking forward to seeing the original film since, based on the little I've read about it so far, the plot is somewhat more elegant and less "messy" than The Departed.
Also, both Deep Cover (Laurence Fishburne and Jeff Goldblum) and No Way Out (Kevin Costner and Gene Hackman) were older films which dealt with similar themes (double-identity and divided loyalties) in ways which I found more compelling. I highly recommend them.
By the way, No Way Out was a remake of an even older film called The Big Clock (based on a novel of the same name). For me, this all connects to some of the issues raised in the dead white males post. If there are only so many stories, it makes sense to ask which is the best example of a given type and form the canon. The tragic love story. The heroic quest. The road trip. The buddy cop film. etc. There are only so many myths... so many archetypes.