Accuphase, Luxman, and Esoteric are all very highly respected and excellent sounding equipment.
I have passionately pursued high end sound for over fifty years… starting right out of college. There is no end to improvements across the board to million dollar systems. I would suggest that you make a habit of spending some time in the best room each high end audio place you go. Not because you are going to buy, but to appreciate how good it can be… and also helpful to calibrate your ears to good sound.
There are many different “kinds of sound” you can pursue… airy 3-dimensional soundstage with incredible detail, heavy bass and midrange Rock systems, and natural musical systems, etc… and all combinations in between.
One common observation is you can experience a system and think… this just couldn’t be better…. Walk into another room and just be blown away with how much better the system sounds. So, you don’t know what you don’t know. A good dealer can guide you… help match the system to your current tastes. They are likely to change over time.