I am finally considering replacing my 12" G4 powerbook. the new Macbooks are very close to what I want in my replacement, I am torn between the 2.0 GHz and the 2.4 GHz if I up the Hard drive on the 2.0 to 250 the extra speed in reality is $200. my question is what is the trade of saving the $200 will I regret not getting the faster machine.