Processor
<a href="http://www.newegg.com/Product/Product.aspx?Item=N82E16819115017" target="_blank">Quad Core</a>
<a href="http://www.newegg.com/Product/Product.aspx?Item=N82E16819115028" target="_blank">Dual Core</a>
The prices are very similar so that's not an issue.