Question: I want to know which machine i should get and why?--More details below if you want to read. Alrite i need someone to help point me in a good direction. I am currently a junior studyin computer graphics & new media to help you know what i intend to use this machine for. I want to know which machine i should get and why? the most expensive one i was looking at was the PM dual 1.8. But do i really need it? Or would getting the iMac be good enough. I would like this computer to last a good amount of time hopefully well after i graduate so i want it to be ahead of its time. Real sorry for the long write-up. Thanks for any help.