If I mostly want to use a 15" Macbook Pro for web related activities, investing, Netflix movies, email, must run Java quickly -- which 15" would be best (and why): 2.4Ghz w/4GB Memory, 2.4Ghz w/8GB Memory, 2.53Ghz w/4GB Memory, 2.66Ghz w/4GB Memory -- in other words is Ram or processor speed more important?