Looking to buy the NEC PA271W-BK display and on the B&H site it's not listed as $899 and the SpectraviewII package is $285, for a total of $1184. But if I choose the display bundled together with the calibrator/software (PA271W-BK-SV), it's $1318. Why is there such a big difference in price? Is there something different about the package deal vs buying separate?