Experience of Mundorf S/O or S/G/O in Merlins VSM

Has any Merlin owner got Mundorfs in X-over.
Used with Esostar softdome tweeter I wonder if sound will
"open up" more than Hovlands. If, will it be at any cost in terms of brighter/edgier sound. S/G/O (very expensive) is said to be better than S/O but also more sensitive to placement. Maybe use Mundorfs for tweeter and Hovlands for the rest plus a S/O for upper midrange. Bass I don´t think matters that much.
BTW I use tubes throughout.
Appreciate comments/thoughts even if You haven´t any experience.

Happy New Year/Ear!