To misquote the Grinch:
“I’ve puzzled and puzzled till my puzzler was sore. Have I missed something I haven't thought of before?”
If I have this correct…
To get the best sound in my living room….I need a sonically-invisible amp, a (solidly built) selector switch as a pre-amp, a modern DAC from the blue segment of the ratings chart (to use with my old cd player as a transport --
or a lossless-playing streamer), and most importantly, speakers having good anechoic on-axis measurements [a flat frequency response curve (+/- 1.5 dB)], that produce the sound signature that I prefer (neutral/warm/bright) (w/DSP?) taking the room itself into consideration as a major determining factor of the reproduced sound being played which is the highest-quality original recording available?