I have two outstanding integrated amps (both were Stereophile Class A stock) that I would not trade for any combination of separates that I've heard.
My Pathos TT RR has upgraded capacitors (Mundorf Silver-Gold-Oil) and resistors (Audio Note). I have the new Sophia Electric blue EL-4-ST power tubes in my Unison S6. Performance from both is so good in my system that I am off the upgrade merry-go-round and can find nothing to criticize when I listen to them.