Microsoft Store offers the 3.49-lb. Lenovo ThinkPad YOGA Intel Haswell Core i5 1.6GHz 12.5" Touchscreen Convertible Ultrabook, model no. 20CD00B4US, for $899 with free shipping. That's $380 off and the lowest total price we could find. It features an Intel Core i5-4200U Haswell 1.6GHz dual-core processor, 12.5" 1920x1080 multi-touch LCD, 4GB RAM, 128GB SSD, 802.11ac wireless, Bluetooth, webcam, media card reader, USB 3.0, HDMI, 4-cell battery and Windows 8.1.

Note that Microsoft Signature Edition devices feature a clean operating system without any third-party trialware. Click here to learn more.