I was thinking about XPS13, but then I've found UX305. Around half the price, with similar specs, works great with Linux, and has mate display (I can work in bright sunlight on my laptop, woohoo!).
Bought a m3800 recently, one of the best laptops I have owned to date.
Currently I am running ubuntu on this beauty and its running without any problems. If only Dell could improve a little bit more on the battery life.
However this thin bezel sure does look sexy... :)