I just bought a MBP with 2.4 GHz Duo and 2 GB RAM with the GE Force Card with a 15" screen. I am going into engineering and aviation at University of Illinois and I am afraid I made the wrong decision on not getting the 4GB of RAM. How expensive is it to upgrade or is it not necessary. Also I heard something about an update in the fall for the Intel chip, do I have anything to worry about? Thanks in advance, I am a Windows guru and I switched to Mac because of their high reputation and of Vistas poor quality, you guys should be proud.