The Sci-Fi Dune mini-series is worth going through just to get to their Children of Dune mini-series. (It covers 'Dune Messiah' and 'Children of Dune' books)
It is by far the best adaptation of Herbert's books.
In production quality, if by FAR made up for how low-rent the first Scifi Channel "Dune" mini was...
(You can actually see they are clearly using *backdrops* in the desert scenes in the first mini...CoD actually used CGI desert scenes...and the music - the music is *awesome*...)