For what it's worth, I run my Sophias with a pair of VTL MB125s or a pair of Quicksilver M120s with the KT150 tube upgrade with great effect but just love to drag out my Pass Labs XA30.5 which I just can't bring myself to sell although heavy and bulky and doesn't physically fit in my system just sounds marvellous and seems to my ears as powerful as the tube amps.
