I currently have the 20" iMac model with 1GB of RAM and the 2.0Ghz Intel processor in it. I was thinking about buying a 4GB ram kit from newegg (only about $85). How much would this actually help me, and with what specifically. Let's say, for example, playing World of Warcraft, using Photoshop, using ProLogic (or other similar Audio program), and everyday computing needs. Someone wanna help me out and see if this is worth it?