So my Macbook Pro is coming and it's a 15in Core Duo 2.16Ghz with 2 cores. It's already up to 2GB of Ram which seems to be the max. But the HDD is only 100GB. Is there a certain limitation I can go up or can I go has high as I want? Because I was hoping to get a 250GB which is the perfect amount. The reason I ask this is because I heard from someone that there is a limitation.