I'm going to be purchasing a Laptop for university and was just wondering what the cheapest one in the Mac lineup was to be able to play wow on all max settings with a decent frame rate. I'm also going to be playing modern warfare 2. Will the 13 inch MacBook pro be good enough for that or should I go for the 15 inch? Thanks! I will be leaving my MacBook air with my mom and the new laptop will be my only computer.