This deal has ended.
Through 7/31, Dell has their Inspiron 530 Desktop starting at $269. Add $430 in upgrades, enter 20% off coupon code 2JP4Q4$ZRFLKFQ, and drop the final price to as low as $559.20. I'd add the 2.93GHz Intel Core 2 Duo, 4GB of memory, 256MB video card, and Blu-Ray player. This gets your final total to $567.20. It does not include a monitor, though you could add one in lieu of other upgrades. Otherwise, check out BradsDeals LCD listings. Shipping adds $39 with sales tax charged in most states.