I just picked up an external monitor for my beloved early-2011 13" MacBook ... it was a long time coming. Admittedly, however, I'm not in love with the picture quality of the new display. Next to my MacBook, the colors are washed out and everything is not nearly as sharp. I know some of that has to do with pixel density. This display is a 1080p 21.5" IPS, like the iMac. But, the iMac I find a lot more vibrant. Is there any external display on the market exactly like the 21.5" iMac?