My old iMac I sold was a 2GHz Core Duo with 256MB ATi x1600, and I've been playing WoWon a 2GHz 2GB RAM 13" MacBook for over a month. Dalaran was a lag fest and my performance was pretty horrible all around. My new i5 QuadCore showed up last night. I spent most of the evening loading WoW on. The 2560x1440 is absolutely massive and beautiful. I'm not sure I'll ever get used to the amount of work space it provides. Once WoW was updated, I logged into Dalaran with default video settings. FPS where around 100 depending where I was in Dalaran. I turned up all video settings to maximum and it dropped down to 30-60 depending where I was in Dalaran. Overall, I'm very happy with the performance. I plan on leaving the video settings to maximum. The screen is very bright, colors and popping, and the 2560x1440 resolution is huge. I was transfering my iPhoto collection, running 3 Safari windows, Vent, playing music in iTunes, and running WoW; and the 4 Gigs of RAM was pushing it. I plan on going to 6 Gigs soon to help out. The screen size and quality needs to be seen in person to fully appreciate. Hopefully Starcraft 2 gets released in the next year so I can run that on this beast.