Narrowing down my buying decision. Going to get a 13.3" Macbook Pro (the price is the deciding factor) and trying to decide between 128 GB SSD of 256 SSD. I will be using the laptop for basic everyday tasks - email, websurfing, some minor photo and video editing, some minor CAD design. I think I will go with 16GB RAM to kind of future proof the laptop but am wondering what SSD would work knowing I could always add an external SSD if I need it. Also, what difference is there between a 1.4 GHZ I5 chip and a 2.4 GHZ i5 chip? Is it worth to by the 2.4 GHZ? Thanks for your help.