HP Direct has their HP (AX300AV) Pavilion p6270z Desktop Computer for a Best of Web price. Make sure you choose the FREE upgrade to a 500GB 7200rpm hard drive. Other specs includes Genuine Windows 7 Home Premium 64-bit, AMD Athlon(TM) X4 620 quad-core processor [2.6GHz, 2MB L2, up to 4000MT/s bus], 4GB of DDR3 RAM, DVD Burner with Lightscribe, 15-in-1 memory card reader and 2x USB inputs (I think there might be more. It’s $499.99 – $20 coupon (SVMY478761) + free shipping = $479.99 shipped!
Don’t forget HP’s $20 coupon: SVMY478761 (Expires: soon)