I most definitely agree with all of the above recommendations for the Classe. Because of its often very low impedance, the Thiel represents a very hard load for an amplifier -- especially an integrated one -- to drive, which may be why you sometimes read negative comments about the speakers when it may be the amplifier that is at fault. Having investigated this issue myself about a year ago when I also owned a speaker with an unusually low impedance, I do know for a fact that Thiel often recommends Classe amplifiers specifically because of their ability to handle difficult speaker loads.
