Amazon offers preorders of the 5.3-lb. Acer Aspire E5-575G-53VG Intel Skylake Core i5 2.3GHz 15.6" 1080p Laptop, model no. NX.GHGAA.001, for $549.99 with free shipping. That's $149 under the lowest total price we could find for any 15.6" laptop with the lesser 940MX DDR3 video card. (This model sports the DDR5 version.) It features an Intel Core i5-6200U 2.3GHz Skylake dual-core processor, 15.6" 1920x1080 (1080p) LED-backlit LCD, 8GB RAM, 256GB SSD, Nvidia GeForce 940MX 2GB DDR5 graphics, 802.11ac wireless, Gigabit Ethernet, Bluetooth 4.1, DVD burner, USB 3.1 and 3.0, HDMI, 6-cell battery, and Windows 10 Home.
Note that this is a preorder; it's unclear when it will be released.