but … if future speakers could be a demanding load, current-hungry, etc I would consider a Plinius. They are biased heavily into class A, but have a lot of power and current available, stable into low impedances.
Plinius is less detailed and refined than Luxman. It sounds warmer with a thick heavy bass but with reduced clarity. My experience was with the SA-100mk3 and the Hautonga received the same remarks.