The new NEC 2690wuxi2 is out. From what the specs say, it's got a wider gamut than the older model (98% adobeRGB vs. 93%) and higher contrast (1000:1 vs. 800:1). Brightness is lower at 320cd/m2 compared to older model at 400cd/m2.
Of course, I just bought the "older" model but I'm still very happy with it. Don't imagine these specs would have made a large difference for me.
It has to dim down more than that.
Otherwise, it would hardly useable for photo editing.