Master & Commander/Far Side of The World.
U571
War Of The Worlds
The complex soundscape of M&C will give an entire surround system a real work-out, especially the sub - the LFs plumb the depths on all sorts of things, including, of course, cannon shots and explosions. If the sub doesn't spit the bit on M&C then it's passed the test.
If the sub sounds like undiferrentiated low rumblings on these different movies, forget it, it ain't good enough. You should be able to tell the depth charges from the cannon shots from the rumbling spaceships.
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