At least for print you'd want to have a screen with wider color gamut. Even though the new iMac's displays are better than the previous ones the display is still only above average. There's a reason why those Eizos and NECs are expensive.
With such a screen it's impossible to do anything related to web design, print etc. (which the iMac is not engineered to do).
For office work it'll be ok. For the price of the machine it's a joke.
So you're comparing a $2500 complete PC to a $2500 monitor? Then saying the price of the PC is a joke? I guess apple is supposed to fit a $2500 display into a $2500 PC.