I work for a small publication and we use iMacs for our production department. I am currently running the newest iMac which runs just fine. We have two other iMacs, one that is only 1 or 2 versions behind mine and the guy using it has zero problems with performance or anything. But the other one we have is the Early 2009 version model number MB417LL/A(basically the base model from that batch). The iMac in question, the main software used is Photoshop CS6(for now), QuarkXPress 8.5, and sometimes Illustrator CS6(also for now). Well the user complains at times of sluggish performance and I feel like it's mostly a memory issue cause the CPU should be fine. Well my question is, would it be more beneficial to upgrade the iMac entirely or simply spend $60-80 to upgrade the memory to one of the 8GB kits out there? If anyone would chime in, that would be very helpful!