What are you planning to do with it? If your looking for a unit to get you on the internet, do school work etc.. I would go with a $499 Dell inspiron with a 1.4ghz/400fsb Celeron M processor.
A+, Network + , HP Certified Tech and MCP
Specs: AMD Phenom II X6 1095T, Asus M477TD, 8GB GSkill Ripjaws DDR3 1600 7-8-7-24 1T, 128GB Crucial M4 SSD, ATi HD4650, W7, 27" HL272 Monitor