I have heard only 2 of those in systems I knew/was familiar with in rooms I knew...Naim Statement, ML33...and then Boulder 2060 (much older), D'Agostino Momeumtum (not in same class presumably), much older Goldmund and earlier Krell References but not the MRA...and also FM monos (not 1811, let alone 118 monos) in our system.
Picking blind, probably would go with either with FM Acoustics or Boulder 3050...depending on load. I would imagine (again blind) that the Boulders would outdrive the FMAs in an all-out test.