I own the RM-9 MKII. All I can say is the more things change the more they stay the same. I can't seem to find any faults with this amp.Strengths:
Soundstage,true to the music,bass,decay, clean highs without being glazed over !
Weaknesses:
Gets pretty warm in my listening room. But what tube amp doesn't! Draws 220 watts at idle , I wouldn't leave this thing running allday. The price you pay for great music.