Lenovo offers its Lenovo N308 NVIDIA 1.8GHz 19.5" Multi-Touch All-in-One Desktop / Tablet PC, model no. 57321143, for $599. Coupon code "USPN308227" cuts it to $319. With free shipping, that's $280 off list and tied with last week's mention as the lowest total price we could find for this model. It features an NVIDIA Tegra T40S 1.8GHz quad-core processor, 19.5" 1600x900 multi-touch LCD, 2GB RAM, 320GB hard drive with 8GB flash storage, 802.11n wireless, Bluetooth 4.0, wireless keyboard and mouse, media card reader, USB, and Android 4.2.2 (Jelly Bean). (It does not include an optical drive.) Deal ends March 13.