I am a film major at the School of Visual Arts and I want to buy a macbook pro. My iMac is busted, so I need a new computer to edit my projects. My school store offers discounts and what not, and has a ton of different models. However, I have no idea what any of this technical mumbojumbo means. I'm basically looking for a laptop with about 500mb of memory. I don't know what any of the other stuff means. What is the best model for my use?