The screens are only "washed out" if you don't calibrate them, because the default settings are just horrible. Yes, it's a TNT panel and therefore there's a difference in the colours if you move your head up and down, but personally I have a chair in front of my computer desk rather than a space hopper so I don't notice that when I'm sat using the machine.
My iMac has no unexpected shutdowns, no strange noises, no dead pixels and no static when using the headphone socket.
So whilst the choice of screen by Apple wasn't the best, my iMac works perfectly as intended by those that designed it. I'm very happy with it
In the numbers Apple are manufacturing there will be some duds, but that's a long way from a design defect as some here are screaming about.
Is there a "guide" or best way to detect if an iMac (20" or 24") has the gradiant issue? Also, what is the best way to calibrate the monitor? Hardware or (preferably free) software?