is the 830 256 worth the extra $10 over the 840 250gb? i some people speculate over the longevity of the 840
http://www.newegg.com/Product/Product.aspx?Item=N82E16820147189 840 250gb
http://www.newegg.com/Product/Product.aspx?Item=N82E16820147135 830. 256
http://www.newegg.com/Product/Product.aspx?Item=N82E16820147189 840 250gb
http://www.newegg.com/Product/Product.aspx?Item=N82E16820147135 830. 256