"As a matter of fact, Spectraview also supports all common colorimeters & spectrophotometers. I also find an idea of custom tuned i1 colorimeter (SVII Pro kit) to be more appealing, than rebranded Spyder3."
It's not a question of sensors, it's a question of monitors, NEC monitors- Spectraview only, any other monitor, another software solution.
And as for the spyder 3 it actually doesn't need to be custom tuned so again you have a device that would be more flexible, would you not?