I am planning to buy a MacBook Pro Retina 15". I find the 13" not a good value because it is an i5 dual core. I already bought a "Refurbished 15.4-inch MacBook Pro 2.0GHz Quad-core Intel i7 with Retina Display with 8GB RAM" for my wife. I am planning to use the new MBR for MicroSoft Office, a bit of Matlab and occasionally Photoshop. I may also connect an external monitor in the future as well as installing windows 8. Which MBP do you recommend. AU$1,869.00 Refurbished 15.4-inch MacBook Pro 2.0GHz Quad-core Intel i7 with Retina Display 8GB, 256GB Flash Storage OR A$2,749.00 15-inch with Retina display 2.5GHz quad-core Intel Core i7 16GB 1600MHz memory 512GB PCIe-based flash storage Intel Iris Pro Graphics NVIDIA GeForce GT 750M with 2GB GDDR5 memory Initially, I wanted the top of the range because I was planning to play games, but I don't see myself playing games anymore. Which one do you recommend?