newegg offers the 5.74-lb. Acer Aspire AS5733-6426 Intel Core i3 2.53GHz 15.6" LED-Backlit Widescreen Notebook in Black, model no. NX.RN5AA.002, for $399.99 with free shipping. (Amazon sells it for the same price.) That's $100 off and among the lowest total prices we've seen for a 16" notebook with an Intel Core i3-380M 2.5GHz processor, 4GB of RAM and a 500GB hard drive. It features an Intel Core i3-380M 2.53GHz dual-core processor, 15.6" 1366x768 LED-backlit widescreen LCD, 4GB RAM, 500GB hard drive, DVD burner, 802.11n wireless, webcam, memory card slot, 6-cell battery, and Windows 7 Home Premium 64-bit.

Update: This system was erroneously listed as having an Ivy Bridge CPU. The Intel Core i3-380M is a previous-generation Arrandale-based processor. We regret the error.

Of note, this notebook is eligible for a Windows 8 Professional upgrade for $14.99.