I'm going to be quite the un-cool one here, instead of saying things like Blood n Guts Vol.2 or RogueAssassinDudeTryingToRunAwayFromThePeopleThatC reatedHimWhileKickingSomeMajorAss, I'm going to go for something a bit more simple.
The Island
Sunshine
With the added bonus both films have great scores too.
Edit: Actually to add to that I suppose I should probably include things like Star Wars etc... I know those tend to be frowned upon by a society of people who think they have 3 balls when they actually have two. But everyone enjoyed that saga as a kid right.