The SW soundtracks of course, though I usually only listen to ABC's versions now. Also Raiders of the Lost Ark.

I really like the first three Harry Potter soundtracks. That's one thing the later movies are really missing, that wondrous John Williams vibe that made the early ones so great. Prisoner of Azkaban in particular is a phenomenal score, and 'A Window to the Past' is one of the best things he's ever written. http://www.youtube.com/watch?v=MrZB9nPMvS4

Also have Jerry Goldsmith's score for Alien, the complete 2-cd Intrada set. An incredible, mostly atonal work, filled with amazing and inventive sounds that perfectly represent the frightening and foreign imagery. It's pretty much a crime against music in general that this score was cut up and hardly used in the movie itself--I think it would have been a much better film if they had gone with it as composed. Goldsmith and Scott completely disagreed on what the tone of some parts of the movie should be, and were never able to resolve this in a satisfactory way, to the film's great loss. The very end, in particular, would have been much better sounding like this: http://www.youtube.com/watch?v=Nju3ZQnRyHI&feature=related&fmt=18

(apologies for less than stellar youtube sound quality, of course)