I am getting a rMBP 13" for college. Will be doing basic MS Office work, gaming via Parallels, and web surfing. I am on a tight $1,300 budget and I have the choice to get the rMBP 13" with 8gb and 128 SSD ($1,289 w/ education discount) and just get an external SSD/HD when I need one or save and get the 256gb SSD ($1,399)? Time is of the essence and wasting more time on saving $$$ for the 256gb doesnt sound appealing at the moment, but I want to make the right decision so I need some input! Thanks!