Hi all, I'm buying RAM from crucial and wondering whether I should upgrade from 1gb to 2gb for roughly $50 or 4gb for roughly $100. Is the latter a no brainer given the price or will i not notice the difference? I typically have safari, mail, itunes, ical, omnifocus and adium open at all times. I basically do no video editing or photoshop work. I rarely play games but like it not to stutter when I do. Any thoughts? Thanks!