Any speakers with 95dB or higher sensitivity.
Have you already bought your "high power" tube amp? IMHO, tube amps perform best at low power and the high power amps are a compromise to try to accomodate less sensitive speakers. I know this is a very broad generalization and people will disagree, especially those owning higher powered tube amps.
I listen at 1/4 to 1/2 watt per channel 98.44% of the time and most people listen below 1 watt when using sensitive speakers.
I just piecked up an amp to play with that is less than 2 watts per channel.
Jerry
