Thanks Mort.I did one with just extended phase linearity on, that sounded good.
Big question. I think you are probably fine using GLM and then DIRAC live with a curve.
That said, I prefer to get my curve from a Wiim for a 2.1 system. It doesn't try to correct like Dirac will unavoidably. But for 4.2 you won't have that option so Dirac is probably fine. Just keep it under 300.
I know they are ugly and expensive but a genelec subwoofer with glm is a special thing. It can really dial in the phase.
Yeah, the subs are not the prettiest things but I can imagine very much worthwhile. I do not think it will pass the wife test unfortunately.