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Dell.com has the Dell Studio Intel Core 2 Quad 2.4GHz, 4GB, 500GB, DVD+/-RW, 20" LCD, for $699 with free shipping.
Final Price for this deal: $699 + Free Shipping

Description:
Intel® Core™ 2 Quad processor Q6600 (8MB L2, 2.4GHz, 1066FSB)
Genuine Windows Vista® Home Premium Edition SP1, 64-Bit
1Yr Ltd Hardware Warranty, InHome Service after Remote Diagnosis
20 inch SP2009WFP Widescreen Flat Panel Monitor
4GB Dual Channel DDR2 SDRAM at 800MHz- 2DIMMs
500GB Serial ATA Hard Drive (7200RPM) w/DataBurst Cache™
16X DVD+/-RW Drive
Integrated Intel® GMA X4500HD Graphics
Integrated 7.1 Channel Audio
Dell Multimedia Keyboard and Premium Optical USB Mouse
Integrated 16-in-1 Media Card Reader
No Modem Option