Welcome to TechIMO. There are a couple of very important questions to ask:
Do you want mobility, battery life, or power? You will only get 2 of the three in a laptop.
Besides internet, itunes, and word, is there anything else you will want to do with this laptop? Any engineering applications or other potential items?
Will you want to take it to class for notes, and if so, are you looking at a tablet at all?