I have used many amps on my Virgo 2's, from 18 watts to 1000 watts! My preference is tubes over SS, but the Virgo's will love both. For tube amps I think you need a minimum of 60 watts, although I have used 40 watts of triode tubes with my Luxman 3045's to great effect. They were great with my Quicksilver MX 190, very good with my George Wright KT 88's. Currently playing with a modded Music Reference RM 9. My Van Alstine Dynaco st 70 sounded delicous and delicate but the lack of power made the soundstage shrink and instruments sounded small, a result of not enough power. I have a weakness for el 34 tubes and keep coming back to them. Lots of stuff comes and goes with different degrees of wonderfullness(or Not), but I find they like a bit of power, they don't need a ton of power, but give them enough and they will give you what they are famous for, that big deep stage and the disappearing act they are known for. These speakers can deliver more than most people can provide. They don't need the best electronics to sound great , but when you do provide better electronics and source they are always up to the task and deliver the goods.
In other words if you do own these speakers, your upgrade path will be electronics and cables long, and I mean long, before you need to upgrade these speakers, they are that good, unfortunately after Virgo 2 it all fell to shit when the original designer sold the company, so if you happen to own these speakers enjoy the bit of magic that you had to privilege to own.
