I currently have a 13" 2006 (rev A) Macbook with a core duo processor running Snow Leopard. I upgraded the RAM to 2GB and the HDD. It seems to struggle with multiple programs open and especially with virtualbox running Vista (only used when I absolutely need it for school). I'm trying to decide if it's worth upgrading now in time for the education discount to a base model 13" macbook pro. Will the core 2 duo make that much of difference? I don't really game with my macbook. It's mainly used for surfing, email, word processing, some photo and video editing, and virtualbox, but I often have several applications open at once. My thinking is to hold out for another year, but if it would be a huge improvement, I would consider opting to upgrade now. Other than some noise from the fan working hard, my macbook has held up pretty well. Would appreciate any advice, thanks.