Good choice..
..but the ElReg readers and Forumites have also added some classics that need mentioning:
Silent Running, without a doubt a grear classic, although it was a 70's eco awareness type message. I loved the three little tape driven drones, Hewie, Louie and Dewie... I was young when I saw it and it sowed the seeds that made me an eternal SciFi fan..
Sunshine: Visually stunning and also real scifi in the fact that mankind would dontate his nuclear arsenal to rekindle the sun... but it was the little things like how a slight alteration in course almost led to disaster and even with all the technology in place, man is the weakness that made the maiden mission fail..
Black Hole, sure I am going to hell for digging this Disney "classic" out, but it was entertaining and also visually brilliant for its era too.
Event Horizon: Love it or hate it, it was believable SciFi with some scares in the plot. Quite enjoyable and one of LFJr's better roles as a stern faced, no nonsense salvage crew commander