Hi all, So it's my first post. I have been checking Macrumors recently since I have been looking for a new mac to start graduate school soon. Currently I have a 2011 13-inch Macbook Air base model which served me quite well through college. It's still in perfect condition except that the fan always gets loud under heavy usage. I saw a lot of people asking all kinds of questions and many of you guys are so kind to answer them or give suggestions. So here's my particular situation. I am a math major. So I do a lot of programming, mainly in C and Fortran. Although my current air works just fine. I fear that graduate-level programming might be much more sophisticated than undergraduate-level. And that's actually the main reason I'm considering the upgrade. But by reading through online posts, I get a feeling that an i7 13 Air is on par with a base model 13 Retina Pro. Other things I care are the display and typing experience. I only tried the Retina Pro in store for several minutes. It looked stunning. But since I will be using it many hours a day. Do you guys have experience which one will be more eye-friendly, meaning less eyestrain? Will the brighter Retina display be any problem in the long run. Typing experience is not much talked about. But from my personal testing at the Apple store, I actually think the Air is more comfortable given the slightly lowered edge. So in short, I'm still not decided whether to get an Air or Pro. Any suggestions or personal experience would be of great help. Thanks a lot first. BTW, I'm deciding between the following two models. Refurbished 2013 13 Macbook Air i7/8GB/256GB for $1269.26 New student 2014 13 Macbook Pro Retina i5/8GB/256GB for $1493.43 or the late 2013 version for the same price as the Air.