You'll want to continue to use the Spectraview software to calibrate the screen but most likely, you'll find you get better results using the new i1Display vs. the NEC puck which, if it's the old ½ egg shaped one, had plastic filters that have been known to fade.
Same thing if you have the Benq 2700 monitor w/ hardware calibration. You'll need to use Benq's software most likely to access the monitors internals.