Assuming I don't hate it in a week or two, I'm probably going with this for the cover. Bit of copy+paste, but I like it and it matches the last cover. Actually, the two line up conspicuously well when side-by-side.
(Rarity's tower is behind the viewpoint; shush)
(No, they don't actually have giant glowing cutie marks above them in the story… probably…)