I have a RMBP 2.6GHz, 512GB, 16GB, with AppleCare on order with an estimated delivery of July 16th. I used my student discount and will get a total of 7% cash back through my Discover Card because I ordered it online and on a bonus day. The total with AppleCare, after tax and all discounts will be $2975. I just called my local Apple Store and they have several base RMBP 2.3GHz, 256GB, and 8GB in stock ready to be picked up. I would lose my Discover Card cash back bonus and the total after tax and AppleCare would be $2372. I am a Civil Engineering student who will be using AutoCAD but I am still not sure if I need the upgrades over the base model. What does everyone think... Would the base model be enough for AutoCad or should I wait it out and pay $603 more for the upgrades?