You might also consider Avantgarde Unos or Duos (if you have the money), and also Coincident Technology's various models which were designed by Israel Blume to work well with low-powered tube amps.
My headphone amp puts out 1/10 of 1 watt! Anyway, make sure you can audition the Soliloquy before buying. I've heard that some changes have been made since it's introduction and the speaker isn't as easy to drive anymore. You could also try Coincident Tech as they make SET friendly speakers.
You must have a verified phone number and physical address in order to post in the Audiogon Forums. Please return to Audiogon.com and complete this step. If you have any questions please contact Support.