Some more uncommon...
Yes, nice collection you have there dmikester1!
In addition to the mentioned above, I would suggest the following:
X2 - Sequel to your X-Men. Nice FX, not so much for your sub but all the same. Worth an evening. If you liked X, you want to have X2.
Sleepy Hollow - Takes place mostly in forrest at night, with many leaves and owles ... and headless horsemen ... riding hard, deep and loud. And a fabulous score from Mr. Elfman.
And some from our friends across the ocean:
Metropolis - A well done Anime with a great - kind of bluesy - score and many distinct sounds, due to large scenes underground in sewers and places. Also some LFE grumbling of tumbling towers.
Spirited Away - An absolutely wonderful movie about responsability and a witch and gods taking a relaxing bath. The score is totaly enthralling. No single scene is a show off, but the entire feature.Try to get a dts edition. It's worth it!
Azumi - A japanese Kill-Bill-like movie showing great swordplay and even some deep meaning. The sound of the final battle is one of the things you would really miss, if you'd be watching it in stereo - which I wouldn't understand.