What do you guys think? Currently I'm running two 512's, so I''ve got a 1GB in there right now. I just tend to run a lot of programs at once and such. Presently, I really only have trouble when opening iPhoto (Almost 4,000 photos inside). When opening iPhoto my computer almost entirley craps out until it's completely open. What do you guys think? I would have to spend $600 to get two 1GB chips. Should I do it? Is it worth $600 for another gig of memory?