i am not a klipsch guy but i would think best of single ended/triode amps from:
decware
linear tube audio
wavelength
cary
audion
air tight
audio note
would fill the bill... at least that is where i would head if i had a 100 db efficient speaker i liked...
decware
linear tube audio
wavelength
cary
audion
air tight
audio note
would fill the bill... at least that is where i would head if i had a 100 db efficient speaker i liked...