Microsoft Store offers the 5-lb. ASUS Transformer Book Flip Signature Edition Haswell Core i5 1.7GHz 15.6" 1080p Convertible Touchscreen Laptop, model no. TP500L-UB51T, for $599 with free shipping. Although we saw it briefly for $25 less two days ago, it's the lowest total price we could find by $117. It converts into a touchscreen tablet and features an Intel Haswell Core i5-4210U 1.7GHz dual-core processor, 15.6" 1920x1080 (1080p) LED-backlit touchscreen LCD, 8GB RAM, 1TB hard drive, 802.11n wireless, webcam, Bluetooth, 3-cell battery, and Windows 8.1 64-bit.