I'm similar, especially as regards the running commentary - what is it with people who don't like a running commentary? - though maybe a little less put off by deviations, judging by how you describe your experience.
I don't know anyone who'd prefer the movie to the book, so watching it is not a must. For me, having seen the movie before reading the book strongly enhanced the experience, but I still consider the book(s) the real deal. I see it rather as an 'addon' to the books. The visual anesthetics are (mostly) very, very good - there's a reason why parts of the imagery from that flick have become so iconic, and still persist in peoples' minds today, even after the (better, and more faithful) adaptation into a miniseries
I'd say give it a try - but don't watch it with your husband (especially not if he hasn't been through either book or movie). Get yourself a glass of good wine, and see if you can make it through all the way. At worst, you'll just find it horrible, but that won't ruin the book for you. At best, your mind's eye will have some pretty good setpieces and imagary at hand the next time you read the book. .
(If, ototh, you don't plan to re-read Dune again at some point, I don't think you'll gain that much from watching the movie.)
As far as adaptations go, It's not in the same league as Paul Jackson's LOTR - not even in the same solar system, tbh - but it does try, and sometimes, it succeeds.