I'd recommend my XPS-15 9510 (no issues with hybrid graphics on ubuntu), but Dell managed to screw up the goddamn touchpad. How? I have no idea. The solution seems to involve soldering an extra ground wire from the bottom of the touchpad to a nearby piece of frame. Hillarous failure. Seems to not be a problem on Windows, so Dell knows a workaround but still lets it cause problems in Linux.