Hello fellow mac owners. I currently own a 13"rMBP from summer14 (Before that a 15" maxed out MBP2011, sold it because I wanted the retina experience). I'm on my last semester of the bachelor (going for the masters afterwards), and I'm often (almost only) working away from home, thereby making the laptop my main and only monitor. Wondering if I will gain some productivity in being able to handle multiple pdf documents and/or word documents side by side. Would it be worth gaining those 2 extra inches of real estate, and thereby be able to run at higher resolution? Running 1440x900 now on the 13inch. It will cost me alot with selling the 13" and buying the 15", but it's an investment towards my degree so every little gain in productivity counts. The upgrade would 'only' be for the larger screen. Don't really need the extra horsepower, but of course that will increase it's longevity. And yes, I've been researching a lot on this subject, but everyone is making their choices/advice based on horsepower, whereas I'm really only making the choice based on screen real estate/productivity. Thanks in advance for any advice.