I recently saw a new release of a remake of Dune II and it caught my interest. I never really played Dune II but love the original C&C and tried Dune 2000 about a year or 2 ago.
So I tried the latest version of Dune Legacy which you can find here.
It is really epic and brings Dune II even a little closer to C&C than it already was.
there are a load of remakes but some have been discontinued etc.
I won't list them all, as I'm not reallyinto all of them, but I will provide a link to a list of em.
The other one which I haven't gotten working but that looks really promising is Dune II - The Maker. It has even more updated graphics and a command bar. I'd still have to play it to see if the visuals mesh well. I was impressed by a youtube video but some of the graphics didn't seem to mesh, maybe it was just the youtube quality.
In any case, Dune Legacy is the easiest to set up for me right now and works incredibly well right on Windows XP, Vista, and Win7.
If you are a Command & Conquer fan, and have never played Dune II, you owe it to yourself to get the original PAK files and give Dune Legacy a try. You won't regret it.
and while you're at it, try Dune 2000, it was made as a total redesign of Dune II by Westwood after Red Alert.