US // UK
As much as I love the UK cover for Fire (and I do - it's lovely), I prefer the US one. The colours, images and text just stand out so much -- it's hard to look away. I don't know what it's like in person, but I bet it's brilliant.
The UK artwork is amazing, and has to be one of the nicest covers I've seen in a long time. It's shelved in the adult sci-fi/fantasy section over here, and it's definitely the most eye-catching cover on the shelves at the moment. Which would you pick?