Pros/Cons to each of these different setups. I find it truly depends on the type of sound you are going for. CJ, Cary, ARC, Pass, Aesthetic, and more...
A colleague has Harbeth 40.2s he paired ups with his CJ 6550 Monos and a CJ GAT preamp. He then bought my upgraded Cary V12R, sold his older SLP-98 preamp, and went out and bought the latest Cary SLP-98 like I have, he added Mundorf caps, and compared for a while. He likes both systems for different reasons when paired with his Harbeth speakers. He also has B&W Speakers that he moved his CJ gear to,. and it worked well for him there. The Cary gear was paired up with the Harbeth speakers for a while, and I went and listened to it back and forth between the Cary and CJ gear. Each system, CJ or Cary had its own type of sound. One was more open and velvety, other a bit more laid back and smooth.
He then took my former upgraded Cary V12R and tried it with these high $ ribbon speakers, https://alsyvox.com, and he and his buddy could not believe the sound compared to other gear at 5x the price. Why? [synergy, matching, different type of sound - maybe]. Perhaps it was just a new/different presentation to hear.
I put more credibility to "matching" now days than anything else. Amp A or B might sound better with different speakers, each in their own way. What it comes down to as my audio buddy drills into my head, "it all comes down to your preference", "whatever you like" is what matters most. Preference varies a lot between many of my own friends and audio-buddy colleagues, fwiw. 