I own a Macbook pro 15in with these specs: 2.8GHZ INTEL CORE 2 DUO/ 4GB RAM/ 500GB HARD DRIVE I'm thinking about selling it and buying a mac mini. I already own a separate monitor. Think this is worth it? I don't know enough about computer to make this decision. I bought the macbook pro used from a friend so... help is much appreciated here. thank you everyone!