Just to add a bit to Andrew's second point, purely for clarification. No, SVII doesn't control luminance value automatically in the sense of choosing it for you, but it does let you set it "automatically" as part of the one step calibration/profiling process. You can save as many custom target settings as you like, and reload them at will. For example, I have a "Nill standard" target that's D65/2.2/100 cd/m², and a "Nill print" target that's D65/2.2/80 cd/m², and switch between them as appropriate.
Nill