I've used my 2 Pi Towers with a Dynaco ST-70, Bottlehead Paramours, Onkyo SS, and Carver amps. I prefer the Carver over all the others. Having owned both tube gear and solid state, I definitely prefer solid state. If you are interested in building a solid state amp, I would recommend Seal Electronics distributed by Brad Wilson in Canada. He can be contacted at bradwilson@telus.net