Best Buy offers the HP Pavilion AMD E2 1.75GHz 23" LED-Backlit Desktop, model no. 23-b364, bundled with 6 Months of Titanium Internet Security for $499.99 with free shipping. (The software is added to your cart automatically.) That's the lowest total price we could find by $80. Features include an AMD E2-2000 1.75GHz dual-core processor, 23" 1920x1080 LED-backlit LCD, 4GB RAM, 500GB 7200RPM hard drive, DVD burner, AMD Radeon HD 7340 graphics, 802.11n wireless, webcam, memory card reader, USB 3.0, and Windows 8.
For in-store pickup only, Fry's Electronics offers the Lenovo H520 Intel Ivy Bridge Core i7 3.4GHz Desktop PC, model no. 57315551, for $548. That's $170 under the lowest total price we could find for a shipped unit sold elsewhere and the best price we've seen for a Lenovo H520 equipped with a Core i7 processor. It features an Intel Ivy Bridge Core i7-3770 3.4GHz quad-core processor, 8GB RAM, 1TB 7200 rpm hard drive, DVD burner, 80211.n wireless, Gigabit Ethernet, USB 3.0, media card reader, HDMI, and Windows 8.