I'm using a Asus UX305L with Ubuntu/Gnome and very happy with it. I went with 2015 model because I wanted the 1920x1080 non-touch screen to save battery. Ubun

I'm using a Asus UX305L with Ubuntu/Gnome and very happy with it. I went with 2015 model because I wanted the 1920x1080 non-touch screen to save battery. Ubuntu on the XPS 13 was unavailable in the time period I made the purchase and I didn't want to deal with the wifi hardware issue. One advantage of the XPS13 is a PCIe connection for the SSD. You didn't mention cost, but the Asus will generally be a little cheaper.