... because without them we probably wouldn't have the Director's Cut of such an amazing, and vastly underrated film. If you've watched the US release, you cannot understand the true Otherworldly essence this movie contains, not only due to the music score, but also the different scene cuts. However, it was very interesting to watch both versions, as the US and the Director's Cut are both on this "Ultimate Edition" DVD set.
Tangerine Dream's score is interesting - electronica, ELO style (if you've seen "Xanadu", you will probably know what I mean), but lacking real depth. Jerry Goldsmith's score truly captures every magical moment throughout the film, and really brings to life not only the scenery, but also the emotions of the characters (and viewers).
The US cut also destroys much of the basic premise of the story - the idea that pure innocence can destroy pure evil. The US cut implies Jack and Lili (made only a Lady in this version, not the Princess of the European release) are already having a sexual relationship at the begining of the film. How can she be considered 'pure' (in traditional fairytale style) if she is having sex (implied or not)? This is but one of the many jarring edits made to this film, which have been rectified in the Director's Cut.
I deifinitely urge anyone to watch this edition - there are not enough true fairytales captured on the big screen for children anymore, and the depth of ideas also makes it enjoyable for adults. Besides, it has Tim Curry as Darkness, the devil - how can you say no to that?
Watch it. Adore it. Feel the magic, and believe.