I would pre-order this second, but I'm still waiting for the "Roof of Heaven" cover to be made available as a Kindle cover. As of right now it's only available as a Large Journal cover, but Oberon has stated that they will be making it available as a Kindle cover.
I have a "Tree of Life" cover for my K1, if you've never seen one in person, no photo could ever do it justice! It is beautiful, as are all the Oberon covers.
Here's a pic of the "Roof of Heaven" journal cover:
