thieliste,
I had a brief stop with Harbeth speakers, SHL5 and 40.1s. Then moved up the YG line. This is my third pair of them. Carmel, Kipod II signature and now Anat III signature. The AudioNet amps are the finest amps I have heard or owned. You can message for more info if you like. They have plenty of power for either Thiel speaker you mentioned. There are a ton of reviews of both the AMP and MAX monoblocks.