My voting is down to two, the Bespin Freeze Chamber and the Felucia set up. I've seen the Felucia set and the guy sculpted every plant by hand, so that's going a long way with me. The Bespin Freeze Chamber's lighting was very complex though, if it's who I believe it is, and it's so beyond accurate it's scary.
I liked the Tusken camp as well but I didn't notice a hole in the hut for Anakin to sneak into it so that's bugged me.
The other two sets are nice but are mostly foamcore construction I'm seeing. Not all though, but especially the Sith set...
So I'm down to the two I mentioned, and not sure which to vote for right now.