Here are my recommendations: * Sunshine: I'll second this one, about a crew on a mission in space, turns into a different kind of film in the second half, whic

Here are my recommendations: * Sunshine: I'll second this one, about a crew on a mission in space, turns into a different kind of film in the second half, which many people didn't like; has breathtaking visuals and a strong soundtrack. * Her: A guy falls in love with an AI; has a wonderful atmosphere * Gattaca: Set in a future of genetic engineering and how the protagonist fights against class discrimination * Ex Machina, this was pretty hyped I'd say, but takes the opposite approach of Her and shows us the dangers of AI * The Day the Earth Stood Still: a representative of aliens arrives on earth to tell humans to knock off their douchebaggery; still highly relevant today * Metropolis: a silent film with a powerful score, set in a future with a large class disparity where the workers rebel Honorable mentions that I'm not sure are really sci-fi: Brazil, The Prestige, Watchmen