I'm an 18 year old student that's going to enter college in the fall. I already own an iPhone, iMac, and MacBook Pro to give you some background info. The iPad really tempts me based on the fact that I can download all of my college books in eBook format and save money and only have to carry the iPad around VS. all of the books individually. With all the Apple products I have already would it be stupid for me to purchase a 16GB iPad?