IF color purity, gamut and even back-lighting are your main concerns, there are two games in town, and Apple isn't one of them. Think
NEC and
Eizo.
Some of those displays however, are not great for video. A few are acceptable by current standards. Also, if you get the less expensive Eizos that boast "1000:1" contrast -in fact ANY monitor that boasts 1000:1 contrast ratios- you are likely to get less even back-lighting.