I posted this problem about half a year ago but was unable to find a solution, so I am trying again.
I have 2 NEC high-gamut monitors, PA301W as primary and LCD2690 as secondary. I calibrate them with Spectraview and an i1 Pro puck. Even right after calibration the displays don't match. The PA301 looks "right" while the 2690 has a slight, but obvious, reddish cast. I have just been living with this, doing all my color-critical work on the PA301, but I would love to fix it. FWIW, the 2690 is a couple of years older than the PA301. Thanks.