Pardon if I'm being ignorant...I have seen both these links reccomended here for i5/i7 builds...I don't see a difference other than price and item #
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371022
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371025
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371022
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371025