I own a 13" 2.26GHz Unibody Macbook Pro with upgraded 5GB of RAM that is starting to wear out I'm afraid. I had to revert back to the stock 160GB drive after my 500GB died about a month ago and the "service battery" warning is now on after 790 cycles with a health of 76%. I'm a CS student with two years to go and I'm not sure this computer will cut it until graduation even if I sink $200 into it (new SSD and battery). It could also be argued that putting $200 into a computer that is worth ~$500 max is a bad idea. I guess what I'm asking is: -Do I sell it and spend a good chunk of change now? -Do I spend a little now to hold me over and buy new when I graduate and have a job? -If I do go the new computer route, do I buy a refurb 13" Air, refurb 15" High-Res, or go all out and get a rMBP? I should also be personally factoring in "Will I regret spending this money when I'm paying back student loans?"