I was initially thinking of getting the Macbook Pro without the retina, as the 128 SSD is too low even with it's benefits, but I think I'll go with it, and just buy an external hard drive later on. My question is which one is better when it comes to performance, I may also run Civilization 5 on it, and would also like to see it's overall features considering if I buy the 8 Gig RAM MBA or just the base [4 Gig] rMBP? Is the MBA with the 8 Gig RAM better than the base rMBP? Might be a silly question but I'd like to know. Also another silly-ish question, since the 128 SSD is just too low, and upgrading the solid state is pretty pricey, is it convenient to get an external hard drive later on in order to manage space well? I'll also use to do lots of student work, downloading a ton of TV shows/Movies, browsing multiple tabs, applications and all that. Thanks.