#4) 2001: A Space Odyssey: The opening part of John Williams' 2001: A Space Oddyssey Theme
#3) Conan the Barbarian: The epic middle part of Basil Poledouris' Prologue / Anvil Of Crom
#2) Jurassic Park: John Williams' Jurassic Park Theme
#1) Barry Lyndon: George Frideric Handel's Sarabande:
Honorable Videogame Mentions:
Mega Man 2 (Nes): This game has plenty of quality tracks composed by Ogeretsu Kun, Manami Ietel, and Yuukichan's Papa
Secret of Mana (Snes): The Opening Theme composed by Hiroki Kikuta
The Legend of Zelda - A Link to the Past (Snes): My favorite 16-bit game. It has some really good music (Koji Kondo)
Good Thread BringBackChrono :D
Edit:
I forgot posting a TV show score. My choice fell on..
The Office (UK Original Version) Opening/Closing Credits: Old classic Handbags and Gladrags by Mike d'Abo