Microsoft Store offers the Dell Inspiron 15 Skylake i7 Quad 15.6" 4K UHD Signature Edition Touch Laptop in Gray, model no. i7559-5012GRY, for $729 with free shipping. That's $20 under our mention from a week ago and the lowest total price we've seen. (It's the best now by $143.) It features an Intel Core i7-6700HQ 2.6GHz Skylake quad-core processor, 15.6" 3840x2160 (4K) touchscreen LCD, 8GB RAM, 1TB hard drive, Nvidia GeForce GTX 960M 4GB video card, 802.11ac wireless, Bluetooth 4.0, webcam, 6-cell battery, and Windows 10 Home 64-bit.