I read all of the original Frank Herbert 'Dune' series many years back, but have never attempted the ones written by his son. I loved them and have re-read them a couple of times, but still prefer the David Lynch film to the newer one; yes, it made cuts and slight changes to the plot, but overall it felt 'right' to me,where the new version failed across the board on so many levels.
Have you read the 'Gaia' Trilogy by John Varley? (Titan, Wizard and Demon, repectively) I think you may like them. And in fact, anything of John Varleys, as he is a somewhat overlooked writer (IMO) who should reach a far wider audience!