Microsoft Store offers the 5.6-lb. Dell Inspiron 15 Signature Edition Intel Haswell Core i5 1.7GHz 15.6" Touchscreen Laptop, model no. i7537T-1122sLV, for $579 with free shipping. That's $20 under our mention from three weeks ago and the lowest total price we've seen for this model. (It's a current price low by $21 and a very strong price for a Dell Inspiron touchscreen laptop with this CPU, 6GB RAM, and 1TB hard drive.) It features an Intel Core i5-4210U 1.7GHz Haswell dual-core processor, 15.6" 1366x768 LCD, 6GB RAM, 1TB hard drive, 802.11n wireless, webcam, USB 3.0, HDMI, 4-cell battery, and Windows 8.1 64-bit. (No optical drive is included.)