Today only, Abt offers the 5.97-lb. Sony VAIO E Series Intel Core i5 2.5GHz 15.5" LED-Backlit Widescreen Notebook in White, model no. VPCEH3NFX/W, for $598 with free shipping. That's $71 off and the lowest total price we could find for this laptop. Features include an Intel Core i5-2450M 2.5GHz dual-core "Sandy Bridge" processor, 15.5" 1366x768 LED-backlit widescreen LCD, 4GB RAM, 500GB hard drive, Blu-ray player / DVD burner, 802.11n wireless, Gigabit Ethernet, and Windows 7 Home Premium 64-bit.

Of note, Abt's specs state that this model has a 320GB/640GB hard drive; per Sony, it's a 500GB hard drive (PDF file).