The Massenburg is a great piece. George Massenburgs stuff is all that good. Very transparent, clean, with amazing headroom.
Ive played with the 8200, its a winner, but, definitely not tubey sounding. Crystal clear, very precise, SS EQ! The outboard power supply for the Massenburg is outstanding, and + and - 24v rails are BEEFY!
FWIW, I dig tube EQ,s with both analog and dsp XO,s.
You couldnt really go wrong with any of the choices listed. You just gotta find whats " Soup Du Jour " for you.