Only 400 watts is required, so I would go for this: http://www.newegg.com/Product/Product.aspx?Item=N82E168.... If you order from newegg, wait for one as a shellshocker special or get on their email promo list. They often have this unit on sale. I can't get the link to work. The unit I'm referring to is the 520 watt neo series in the middle of the page.