The Dune movies are all based on the Dune novels by Frank Herbert, who was a genius. The books are infinitely complex, and also infinitely better than any of the movies. That being said, the movies are still rather cool, even with all their idiosyncrasies. The 1984 version sticks closer to the book in some respects, but is awkward and cheesy. The 2000 miniseries was much neater, but departed from the book. The Children of Dune miniseries was the best of the three, with amazing music and a great visual presence. All three have some interesting hair...
To find the styles you're interested in, click on the movie of your choice on the right side. Each movie has its own separate page with the styles from that particular movie listed in detail. Just click on the thumbnail for each style. Many of the reference pictures are very large resolution, so be sure to check to see if they're expandable to full size.