I like to be modest, but after 50 years of working at it, mine. I have all Audio Research Reference components: Phonostage, DAC, Preamp, and amp (see my user ID). My streamer is Aurender W20SE and Turntable is a Linn LP12 (almost Klimax) with Sonus Faber Amati Traditional speakers in an insanely good audio space (by accident).
What is amazing is that it is incredibly musical and involving… it has the details of an ear bleed system… but the details are not forced on you… it is emotionally involving.
I have heard million dollar systems that are holographic and mesmerizing, but not nearly as musical and involving like mine. Over the last fifty years my understanding of what a great system sounded like has changed substantially. It began with loud, with heavy bass… and landed me here with incredibly involving, articulate, emotional, with great detail. It has been a great journey, and I love where I have landed… retired with the be st system I have heard.