There is so much interaction between a system and room as well as the interaction between components, wires, power cords, power conditioners, etc. that there is no best in every case just the best you have heard in your situation.It is not a question about the "best"...Save for the fact that we all hope to buy the best possible components and the gear make a difference for sure...
BUT the room acoustical controls are the more powerful upgrade possible for ANY system...So huge that if you had the best possible room controls you dont need and dont dream to upgrade even with relatively good average components...
And it is not necessary to listen to other system to be sure about that...
If you want to know if your room is good, listen to The Three penny opera 1958 by Kurt Weill with Lotte Lenya and if you could listen the orchestra playing in front of you, seating in front of your speakers, but the singers voices coming from your back wall where there is no speakers, your room is under acoustic controls....If not, buying a cable AT ANY PRICE will not give you this nor buying most tweaks or a costly dac or amplifier.... Acoustic is key....
I will not speak about voice timbre or instrumental timbre which sound unnatural even in many very costly systems or very tweaked one i listen to...
Then in audio forget price, think acoustic....
And audio is not about "taste" but about acoustic....