Dune, the I guess re-release of the 1970s/80s game.
It has updated art and clearer rules from that version. There is also an expansion but I'm not convinced it needs one for the same reason WotR had skippable expansions (I thought they just added more pieces and made the already huge game ... larger). BUT ... people rave about the Dune expansion. I might get it at some point if the game starts to feel rote.
Imperium didn't sound like the bones a good game upon my sniff test. I will probably try it since Dune content outside of new books are hard to find.