A regularly calibrated one (and a Pantone deck in your back pocket).
It's common thinking that the old Apple style (on G4 range) monitors are the best. Whether it was for photo retouching, illustration or video, these displays are still top notch.
They came in 15" , 17" and 22" , the latter still fetching £800- £900 on eBay when they do occasionally come up.
I would go for Eizo/Lacie if you have the budget.
If you are looking to save : then go for the Nec
A regularly calibrated one (and a Pantone deck in your back pocket).