Really? I think the 4th was the absolute worst in terms of book to movie closeness. They had to cut soooo much stuff it's not even funny. The book was way too long to begin with. >_>
I'm not sure which movie is actually the closest, but the 1st movie is always going to be high for me. They stayed pretty true to the major points IMO. All in all, I do fully enjoy the series, books, movies and all. I've basically grown up with the series from a young age reading the books.
dmaster out.