I have listened to about 6 different in my system. ARC monos being one of the six. I truly think you should think twice before getting ARC or VTL. If you have the opportunity to demo a Atma-sphere amp ma1 even better ma2, I think you will be amazed at the low level detail you will hear and its ability to easily drive 4 ohm loads, these amps do sell on audiogon but if you watch they sell quickly, THEY ARE ONE OF THE BEST. I have the ma2 and the matching preamp mp1, with wilson speakers. You can listen to this system for hours. OTL's are really sweet!