Some of my favorites are:
U571 - the depth charges, and squeeks in the submarine make it so
real and intense
Matrix - the original has some great parts, the lobby scene and the helicopter
scenes are great
Lion King - yah its a kids movie, but the picture quality is great, the songs are
amazing and there is a part in the elephant graveyard that shakes
the house
Rounders - Okay, so not the best for Home Theatre, but Matt Damon is
awesome, a must watch for any texas hold 'em poker fan
Finding Nemo - Again, great video, and cool when the fish swim to each
speaker, and when darla taps on the fish bowl it made my
door shake.
Just a few that haven't really been mentioned yet, other than U571!