Got the Centerpieces for $28 each, and so I'm set on those now. They're selling out at $35 it seems, or at least Vader is. Now that I have them, I don't look at the Vader set as nice for 4@ figures as I once felt it might be. My gripes are the stylized design with parts of the wall missing and things. Had at least the doorway been complete I'd have a better opinion there.
To me though I got it for its intended 6" scale purpose. I plan to put 6" figures from the Bandai kits around it and use it as a (drum roll) centerpiece type thing since I don't really collect 6".
Now I opened Luke on the weekend and I gotta say this is 100% cooler for 4" figures. To my eye, the foot is definitely scaled more to them. Plus I was surprised to see two "snow piles" you snap on, but for seemingly two purposes. One is small and the other is much larger with footprints in it. The smaller one is great though if you're wanting to use 4" figures since it obviously eliminates the oversized footprints.

I'm much happier with the ATAT foot then. Kinda unexpectedly so, as the Vader interested me more when these came out.
Vader is more the "centerpiece" to me though and iconic looking. Luke is just meh.