For US$100 less than the Windows version, you can get the Dell M3800 Developer Edition “workstation” laptop with Ubuntu 14.04. The desktop works nicely on the 3840×2160 15.6” screen, but app support is a bit mixed <http://arstechnica.com/gadgets/2015/03/review-dell-m3800-developer-edition-is-a-great-linux-pc-with-a-few-rough-edges/>.