So I have always loved the design of the pre-unibody MacBook Pros. And I have been looking into buying one just to mess around with. I would get a PowerBook G4 but those are just too old too do much of anything and I wanted to at least be able to do simple web browsing on it. So I know that a bunch of the pre-unibody MBPs have GPU defects and cooling issues. So i'm wondering out of all the models of this machine, which of them is the MOST reliable one. Thanks.