it is a good deal, and since these are last year's models, you'd better grab them while you can! you may save 10-20 waiting for a super sale, but no guarantee you'll be ahead of the 1000's of others just waiting to jump on the deals.
the only other thing you may need is a 3.5 to 2.5" adapter kit, which can be had for as low as $5. the only other thing in the kit would be software to copy/transfer from an original drive. since you're building entirely new, then you'd be wasting your money.http://www.newegg.com/Product/Product.aspx?Item=N82E16817997013