I've lost count of how many I've actually seen, but these are the ones I have on DVD:

The Score
Ronin
Jackie Brown
Casino
The Untouchables
Angel Heart
The Mission
Raging Bull
Taxi Driver
Godfather Part 2
Mean Streets
Once Upon a Time in America
Goodfellas
Heat
Frankenstein
A Bronx Tale
Cape Fear
Sleepers
Meet the Parents
True Confessions