LIGHT OF THE FORCE (basically, a variation of the Force theme, when Luke is lighting the funeral pyre) - this literally has just moved me to tears
YODA AND THE FORCE (when Yoda is lifting the X-Wing out of the swamp)
IMPERIAL MARCH (how could you not pick it, really?)
But I really do love it all. Even though I hate the PT, DUEL OF THE FATES deserves a mention, but even more than that Han and Leia's romantic theme is really stirring.