I'm purchasing my first macbook pro 13" 2012 model this weekend but after seeing how much faster SSD does make the laptop, I don't know which I should initially upgrade. I was planning to upgrade RAM and SSD, but which do you think I should let apple install and which do you think I should install later on? Because I'm a student budget is tight and I can only afford to upgrade one of the two later on the year. Keep in mind if I upgrade the SSD it's to 128 gb and if it's the RAM it is to 8gb. Thanks!