+1 for Linear Tube Audio MicroZOTL if you buy new. I use mine as a headphone amp. It is excellent. And if you buy used +1 Audible Illusions L3A.
I use my AI in my main system and TAS for years refers to it as “best at any price!”.
I use my AI in my main system and TAS for years refers to it as “best at any price!”.