Heres my sugestions for a $600 comp
CPU - http://www.newegg.com/Product/Product.aspx?Item=N82E16819115014
$140 - 2ghz core 2 duo
Mobo - http://www.newegg.com/Product/Product.aspx?Item=N82E16813128049
$60
Mem - http://www.newegg.com/Product/Product.aspx?Item=N82E16820231119
$110
Drives - http://www.newegg.com/Product/Product.aspx?Item=N82E16822144416
$55/ea x 2 = $110
Video - http://www.newegg.com/Product/Product.aspx?Item=N82E16814195030
$170
Audio - Integrated
Fan for processor - http://www.newegg.com/Product/Product.aspx?Item=N82E16835106085
$19
Total - $605
A little over $600, but id make a prety bomb ass comp… 2gb mem, 400gb of sata 2 drives, 512mb pci-x16 video, not bad…