Im planning on getting a 13" 2012 MBP and am not sure what combination would be best. I dont need the optical drive anyways, so Its a bit of a toss up for me right now. I'm going to have more than 256GB of data, I know that for sure. Im just not sure what will be more cost effective and efficient for daily use. I also plan on getting a usb3.0 external drive, but I like to have most of my data on me at all times. thanks!