So far I've yet to find a student that could perform the needed work on a tablet. This may change over time but my bet is that many folk will buy a tablet and discover they need the laptop soon.
As to the 128 or 256 question, 256 is the safe answer.
Erm, next year I'm going to enter college. I planning to buy myself an Apple product that will be useful in my college life. Mostly, I will surf net, YouTube, projects, some music and one or two games. I want a fast one and I have an external hard disk. Previously, my friend recommends me to take iPad since its portable but Air seems to be better and Pro is better on performance. Guys, I need your help, in a dilemma now. And kindly specify the type should I buy, like for Air its either 128Gb or 256Gb. Thanks.