Thanks Irwin! The Summits have a 200w powered built in amp, so it won't be comparable. The Neoliths have no built in amp. Your first speaker probably didn't have amp, so it would be a better comparison.
Tablejockey, When you heard the Neoliths through couple of near equal power tube amps, how loud was the volume? How large was the room? I listen at volumes where my daughter has to put on head phones two rooms over and my wife will tell me to turn them down if she's home. I'm guessing my soft is 60-80 decibels and my concert level is 100+ decipels. I also have a 20' x 30' room that is open to the kitchen, then hallway then the rest of the house with no doors.