Its not often that a film score and soundtrack perfectly compliment each other. The last time for me was American Beauty. The soundtrack contains many of the more sassy songs from the moments of action in the film, which will give you the highlights in flashbacks. The best there is undoubtedly the opening track by muse - from the baseball scene in the film.
The score delivers a more subtle satisfaction. Carter Burwell has perfectly captured the running undertones of the film and the sense of longing and tension felt by Edward and Bella. The haunting strings that represent Bella's moments of fear are present as a recurring theme in several tracks, and serve you with a heady delight as memories of the beauty and danger of Edward will return to you. Bella's lullaby stands out as the piano piece played by Edward in the film, but "The Skin of a killer" is another wonderful moment, returning memories of his illuminated beauty.
This sound track is just as good as the words of the books - representing the feelings of the many millions of fans and making them tangible.