The new 3-pound Dell XPS 13 with a 13.3-inch 1080p display is now on sale. It has a much wider 72 percent color gamut (instead of 45 percent for the 720p models), and a 3rd-gen Core i5 with 8GB of RAM, Intel HD 4000 graphics, Windows 8 and a 256GB SSD. It will run $1,400. A 3rd-gen Core i7 model will start at $1,600 with the same specs. You’ll be able to buy the latter model by February 14th, while the Core i5 (and lower-priced 720p) versions are in stock and shipping now.