Best Computer under $600 (no monitor needed)
go check out BensBargains.net and search for dell. They always have a coupon for Dell. You can get a great machine that way. it is usually either a sale at dell or a $300 off when you buy a $1000 computer so that would make it only $700. Right now this one looks good for you but these deals change every week just watch them for a while and see what you like
Inspiron 530 Quad 2.4GHz 3GB 500GB Desktop $579 shipped.
http://bensbargains.net/search.php