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So far, the sci-fi miniseries. ^(Wow, that's gone up. Glad I still have my copy)
Not as grandiose as the Villeneuve version, and you can certainly tell a lot of things were shot on set, but overall I think it did a really good job of telling the story, the acting was fine to good, and it was never slow or tedious.
You can find it on Amazon
I was lucky and bought them on DVD at release so I have them forever, especially since I keep digital backups (and in case anyone asks, no you can't have a copy, they are backups to save my DVD's, not to conduct piracy).
Umbrella Entertainment - Australia
JB Hi-Fi - Australia
There's the first 4 results when typing "Buy Dune Miniseries" in Google, hook yourself up today, it's not even expensive. ;)
Here's one at least...