In no particular order:
Monty Python and the Holy Grail
Apocolypse Now (I prefer the redux version)
Full Metal Jacket
Platoon
Black Hawk Down
Rocky
Alien(s)
Wayne's World
Master and Commander (almost entirely because of the DTS track on the dvd)
The Rock (I don't know why)
Band of Brothers (I know...it's a mini-series, but it plays like a 10 hour long movie. And since it's my favorite war film it deserves to be listed)
I'll probably come up with more as time progresses.