You'd think the opening scenes in 2001 were written to be synchronized with Fanfare and the Blue Danube, so when I found out those scenes were filmed and then music aquired to accompany them, I was very impressed, it's some of the most beautiful imagery and sound compilation ever filmed. Wonderful stuff.
I'm a huge science fiction fan, a bit of a trekkie, but largely into reading. I'm currently concluding the Ender Saga by Orson Scott Card, a must for any sci fi fan.