I concur with the above comments about the Berning. Although I haven't heard with Virgo's I have no doubt that it would be a great match. A great feature of this amp is the 3 feedback settings to tailor the sound to your tastes and speakers. You will also realize bass control ala ss and excellent high frequency extension along with that great midrange.
Although not a true OTL amp, the Berning has more of an "OTL" presentation of the music rather than the euphonic coloring added by many other tube designs. If this is what you are looking for you will be pleased. btw, Berning has been manufacturing amps and pre-amps since the early 70's. They are not "me too" products but innovative, dependable and cutting edge designs. The David Berning Company means just that, you are purchasing a product designed and assembled by David Berning himself.
Although not a true OTL amp, the Berning has more of an "OTL" presentation of the music rather than the euphonic coloring added by many other tube designs. If this is what you are looking for you will be pleased. btw, Berning has been manufacturing amps and pre-amps since the early 70's. They are not "me too" products but innovative, dependable and cutting edge designs. The David Berning Company means just that, you are purchasing a product designed and assembled by David Berning himself.