Newbie Can't Decide Which Tube Amp

Just had a Bottlehead tech build me a BeePre preamp and an MM phono. My speakers are Sonus Faber Concertos Homage (rated at 87dB sensitivity) and my budget is $4K- give or take. I am not much of a bass person. Mostly classical, appreciate the Blues, Latin, and occasional classic rock. The tech is adamant that I look for a used EAR 534.

I appreciate your feedback in advance.