Long time site visitor, first time poster.... I'm in need of advice regarding a new rMBP. I currently have an late 2012 MBA (13", i5, 8GB RAM, 128 SSD). Unfortunately, the computer keeps freezing frequently and I'm left with only a beachball or spinning 'tick marks' in a circle. So, I'm in the market for a new computer. I use my computer heavily but not for intensive tasks. I'm in grad school so a lot of writing (Word) and large excel files and databases or SPSS, and then general web (but with lots of tabs), email, and light photo editing and storage (though I do have a 100+ GB photo library). While I like the 13" screen size I'm intrigued with a larger screen. I also would like a larger HD. My 128 GB filled up quickly, so I know I need at least 256 but would like to swing to 512 if possible. I have the option to buy a late 2013 rMBP (15", 16 GB RAM, 512 SSD) from a friend for $!,800. The computer checks all my needs, but I'm a bit hesitant to spend that much (though I know that what it will costs to get all my need covered). So - any suggestions? Is this a fair price? Any known issues with the late 2013 rMBP 15" models? Also - I can go through the Apple store with the edu discount if I want to buy something new. Thanks in advance.