By contrast the Scyfy mini-serie is closer to the book but is boring in that it doesn't bring anything compared to the book.
Granted last time I saw the Lynch movie was 20 years ago about but I'll watch it again this month :-)
Another completely different take on Dune that used scenes from the movie and was really great even though it was very loosely based on the book was the game from Cryo. If you have a chance to play it, do it. It's a very weird and interesting mix of adventure and strategy.
It's actually kind of amazing how much inspiration this book gave to multiple innovative projects from the Lynch movie, the Jodorowsky movie (I wish I could go to a parallel universe where this movie got made...), the first real RTS Dune 2, the weird and imaginative Dune game from Cryo...