This Desktop PC

Dell Small Business has the Dell Vostro 400 Mini Tower Desktop, Intel Core 2 Duo 2.20GHz, 2GB DDR2 SDRAM, 250GB, 16x DL DVD

CircuitCity.com has the HP Pavilion M9040N Elite Desktop PC, Intel Core 2 Quad 2.40GHz, 3GB DDR2, 640GB, LightScribe DL DVD

CircuitCity.com has the HP Pavilion M8330F Desktop Computer, AMD Phenom 9500 Quad-Core Processor 2.2GHz, 3GB RAM, 640GB, Lightscribe DL DVD

Buy.com has the HP Dc5750 Desktop PC, 1 AMD Athlon 64 3800+ 2.4GHz, 1GB DDR2, 80GB, CD-RW/DVD-ROM Combo, XP Professional $379.99 Shipped after $10 off $200 new customer coupon.

Product description from Buy.com:

AMD Athlon 64 3800+ 2.4GHz w/ HTT, 512KB L2, 1GB PC2-5300 DDR2, 80GB 7200rpm SATA, SATA 48x CD-RW/DVD Combo, integrated graphics and audio, BCM5755 Gigabit NIC, Win XP Pro!
SP2, Microtower

Product link.

Dell Home has the Inspiron 530 Desktop with Core 2 Quad Q6600 2.4GHz CPU, 24″ Digital LCD, 1GB DDR2, GeForce 8300GS Video for $1049 - $300 code GK0PFMHHW8TDBV (Expires 2/28) = $749 with free shipping. 24″ E248WFP Entry Widescreen Digital Flat Panel Monitor included in this config.
Core 2 Quad Q6600 2.4GHz, 1GB DDR2 Memory, 250GB SATA Hard Drive
48x CDRW Drive, Dell USB Keyboard & Optical Mouse, 10!
/100 + 56k Modem
GeForce 8300GS Video, 7.1 Audio, Windows Vista Premium, 24″ Dell LCD

HP Home has the HP Pavilion A6360t Desktop, Intel Core 2 Duo 2.2GHz, 2GB DDR2, 500GB, LighstScribe DL DVD

Dell Home has the Dell Inspiron 530 Desktop, Intel Core 2 Quad 2.4GHz, 2GB DDR2, 250GB, 16x DL DVD

Dell Small Business has the Dell Precision T3400 375W Desktop,Intel Core 2 Duo 1.80GHz, 1GB DDR2, 80GB, 16x DL DVD

CircuitCity.com has the HP Pavilion M9040N Elite Desktop PC, Intel Core 2 Quad 2.40GHz, 3GB DDR2, 640GB, LightScribe DL DVD

Dell Small Business has the Dell Vostro 200 Slim Tower, Intel Pentium Dual-Core 1.80GHz, 2GB DDR2 SDRAM, 160GB, 16x DL DVD