Its expecting an sRGB like gamut display.
So I should get NEC's whole Pro Kit, then.
I've had very good results using existing Colorimeters including the EyeOne Display-2 and OPTIX. I'd stick with it unless, depending on your target white point calibration, you don't get acceptable results. Yes, a mated colorimeter is preferred and ideal, but NEC and other wide gamut displays have been using the older colorimeter products for some time and with user satisfaction.
IF you find the kits price point within your budget, go for it. You only get the kit deal once if I'm not mistaken. Otherwise, the software alone is something like $99.