Buy.com offers the 5.7-lb. ASUS Intel Core i5 Dual-Core 2.5GHz 15.6" LED-Backlit Widescreen Notebook
in Mocha, model no. K53SD-DS51, for $649
with free shipping
. That's the lowest total price we could find by $56. Features include an Intel Core i5-2450M 2.5GHz Sandy Bridge dual-core processor, 15.6" 1366x768 widescreen LED-backlit LCD, 6GB RAM, 750GB hard drive, DVD burner, 802.11n wireless, Gigabit Ethernet, webcam, HDMI, 6-cell battery and Windows 7 Home Premium 64-bit. Deal ends August 15.