I think OP bought the ram and ssd during a sale, that's why he bought it before the book. OP, the Cmbp is what you want. You can still make use of its primary hard drive by taking out the optical drive and putting the hdd in there. The adaptors for that can be bought for ~20 bucks on amazon/ebay. Your mbp will not go obsolete any time soon. Expect it to be upgradeable for the next two OSes. Even after it's not upgradeable to the latest OS, it will still function, and function fast. Most apps support the previous 2 OS's too.