Had a fan bearing start to rattle on my G5 so I took it into the apple store for repair. Took a week and had to use my mac mini in its place. Oh I can't tell you how painfull that was. Every little thing was slower. Just got my G5 back tonight and WOW the speed is unbelievable and its only a dual 2ghz. I can't imagine what those quads will feel like too bad I had to cancel my order due to low funds.