I still don't have a large AT-AT, only Titaniums and Action Fleet. The last release was a TRU exclusive, and we don't have one here anymore. I guess I didn't feel like ordering it since I believe it had an Endor deco to it. I'd rather get a plain one that works better in a Hoth scene.
I agree that the Turbo Tank is kind of boring. With space to put these things becoming scarce at my place, I might pass on it. A Hoth AT-AT I probably would get, and a Sail Barge I definitely would get. The latter would be a good place to display/store a lot of figures.