Good input guys. For comparison purposes with the Lux and Hegel , listened to some demos with the Moon Audio 600i V2 & although spatially more expansive, it just does not have the smooth sweetness of note contours displayed by the others. In fact , I would safely bet. at least for my music tastes, the MA 600i to get rather tiresome in time.
So, the process of elimination leaves in the Lux and Hegel while striking out other equally well rated amps with significantly different sound signatures.