The PA241W is factory calibrated, has special free software (Multiprofiler) that can set luminance, white and black, point, TRC and even chromatic coordinates of primaries, and after that it creates proper ICC profile. I've validated the results with Patchtool and my i1pro spectrophotometer and it's suprisingly close to desired target, so the SVII hardware calibration is not really necessary.
If someone expects the perfection, he should try to get Spectraview II and custom matted colorimetrer from US somehow, it's not available in Europe, and the european Spectraview Reference edition of the display needs a ColorMunki or EyeOne Pro spectro to be precisely calibrated - I belive that Multiprofiler by itself can calibrate the display precisier, than regular i1d2 or DTP94 colorimeter and Spectraview Display 4 a.k.a. basICColor Display 4 (actually - I've tested the Reference 241 with my DTP94 and i1pro, and I'm quite sure about that, apart from the fact, that none of my calibration devices can be considered as reference)