Look, I'm a big fan of the original Dune series (not of the mess Frank Herbert's son did after his death in order to make money out of his father vision - those books actually ruined a bit of the originals for me, I actually suggest that you don't read those).

Anyway, first time I saw Lynch's Dune I didn't really liked it because it was too different from the books. But after some years (and reading the all series from Frank Herbert) I actually started to like the film.

See, for me, Lynch's film, was the best possible one. A lot of Dune is about thoughts, mental plans, counter plans. A mental chess game that goes on the mind of all the main characters and I don't think you can actually put all that on screen (at lest not without extending the film for several hours).

Sure you could have a grander vision of the books with better SciFi and a lot more money, but other than visually for an higher budget, I don't think any director can really do much better than Lynch.

Well, it's my take at least. I might be wrong (and would like to be proven wrong by a new Dune movie that exceeds my expectations) but until I see a movie that does better, I actually vouch for Lynch's Dune.