Just saw this movie and i loved it! So I am looking forward to adding it to my collection, but there seems to to versions out a PG and a PG-13 version. Whats the difference and what is the most "unrated" version? MPAA's site did not really give any clues (that I could understand anyway ). So what is the version to get? (when possible I prefer my movies to be unrated i.e. closest to the directors original vision). Thanks in advance.