I think I'm just about sold on a new MBA but what I need to decide on is specs. I'm a student who will use it to power an external monitor when I'm at home, run HD movies, various word processing and the occasional use of X-Code. Keeping this in mind should I fork out for the i7 and 8GB of ram or is that serious overkill. I am moving to Mac so I want something that will last for the foreseeable future with out need of upgrade. Also if I plan to store document and movies on cloud storage and external HD's will 128GB be enough (keeping in mind I will most likely bootcamp win7). Thanks.