If someone expresses an interest in SET amplifiers I’ll encourage the pursuit. I have very happily owned 300b SET amplifiers for over 13 years. My appreciation and admiration for them has only grown.
If the SET amplifier is good quality and speaker choice is compatible, fabulous sound quality can be expected. It sure seems that you have very suitable speakers. If the amplifier holds up its end of the bargain, you will be very pleased.
Charles