A best bet is the 6.6-lb. Toshiba Satellite P870-BT3N22 Core i5 2.6GHz 17.3" LED-Backlit Laptop (pictured) for $679.99 with free shipping. That's $340 off list, $20 under our winter mention of a weaker configuration (with a slower processor, less RAM, and smaller hard drive), and the lowest total price we could find. Features include an Intel Core i5-3230M Ivy Bridge 2.6GHz dual-core processor, 17.3" 1600x900 LED-backlit widescreen LCD, 8GB RAM, 1TB hard drive, DVD burner, 802.11n wireless, webcam, HDMI output, 6-cell battery, and Windows 8.
Update: Specs corrected.