Hey there, I'm in the market for a new MacBook pro. I'm giving my 2012 2.3 GHz MBP (non-retina) to my mother, and will be replacing it with another 15" model. I honestly don't need all the processing power of a quad-core processor, but I can't be without the screen real estate. My current configuration is a 2.3 GHz Macbook Pro with 16 GB RAM, and a 512 GB SSD. I know that I will not be able to downgrade to the 256 GB SSD offered in the entry-level MBPr, so I will either have to customize it to 512 GB (costing $2300). But, if I'm already paying $2300 on a new machine, why not just buy the 2.5 GHz model for $200 more? For the extra $200, you get a little more processing power, dedicated graphics and the included 512GB SSD. Also, another question. If I went with the 2.2 GHz model, is it possible to get a third party 512GB SSD with the same standards as apple offers? Thanks!!