I am about to upgrade from a Macbook to a Macbook Pro and I had a few questions. Now I know there have been many threads on the Macbook Pro and gaming, but I haven't found one that specifically compares the current models against each other. My major question is, which Macbook Pro should I buy? I already know that I'm going to get a 15 inch model but is there a significant difference between the 2.2ghz or 2.4ghz models? Now before you say "go for the upgraded one," I am a college student with limited funds. I mostly want it to play games like Half-Life 2, CS:Source and TF2 so I guess my question is mostly for those of you who own the 2.2ghz Pro. How do these games (and others) run? Thanks for any help!