My Christmas present this year is a Cayin Cs55a. It sounds super through headphones. I purchased new at 40+% off so even happier. If headphones alone are your thing your could try a headphone amp / dac . I have an iFi iDSD micro BL and it is great for the cost. However the Cayin is even better, to my ears.
That sound is right for me.
It is youtube video and I am listening through headphone. It is really right sound for me. It is nothing to do with the speakers as I am listening through headphone. This guy has made preamplifier and power amplifier both by himself and they are both tube one.
My question is that which pre and power could have that high in the market? does not matter it is brand new or used.