System Matching

I don’t have much knowledge of system matching and need your feedback if one of the components in my set up isn’t in harmony with the others.
I know much of it is subjective, but your responses are greatly appreciated. I'm at the point where I cant see the "forest through the trees"...if you get my meaning.
 
Unison Research Unico Secondo Integrated Amp
Cambridge Audio Azur 840C
Sonus Faber Grand Piano Domus.