Hey guys I have a 2.4ghz 15 inch SR MBP with 2gigs of ram. Is there any point in upgrading my ram to 4GB? I usually use quicktime, itunes, safari, mail, adium, quicksilver which are pretty much always open. However, I am thinking about using parallels and using windows XP or Vista over that because ive got some Electrical Engineering programs I need windows for. Do you think parallels will see a good improvement? What about without parallels, is there any point? I hear OSX does a pretty good job of caching programs and making use of your memory, so could I expect some sort of battery life increase?