Quality screen

I was waiting for the next iMac but can't wait any longer so I want to get a 24 or 27" (prefer 27") screen that shows good colours. I am a digital painter, graphic designer so I need something decent. I was looking at the Samsung website but they don't give info on how many colours their LED screens have in the tech specs so I am unsure of it though I hear Samsung makes great screens.

Is there any go to brand or screen when it comes to quality at a good price?

Thanks