Personally I would build my own system to run linux on. It isn't as hard as some think it is. There are lots of tutorials on it and odds are there is a nerd some where close by that will help you.
Yeah, but I don't have a 3D printer to make the case out of, and if I make it out of wood in my garage it'll be a bit too heavy, not to mention hard to ool. (I'm sure you understand what form factor an "UltraBook" is.)