Buy.com offers the 5.5-lb. HP ProBook 4540s Intel Ivy Bridge Core i5 2.5GHz 15.6" LED-Backlit Laptop
, model no. B2D26UT#ABA, for $599
with free shipping
. That's the lowest total price we could find by $3 and the best price we've seen for an HP ProBook with a 16" screen and Core i5 CPU. Features include an Intel Core i5-3210M 2.5GHz Ivy Bridge dual-core processor, 15.6" 1366x768 LED-backlit LCD, 4GB RAM, 500GB hard drive, DVD burner, 802.11n wireless, Gigabit Ethernet, Bluetooth, 6-cell battery, and Windows 7 Professional 64-bit.