I understand your point.
The point is exactly as you have said, "synergy." And amps and cd players made by the same manufacturer will typically complement each other to the point that, where the amp is weak, the cd player is strong, and vice versa.
And I believe I mentioned Arcam, Goldmund and Cambridge amps, if you re-read my post. I also pointed out a review of the Cambridge on avguide.com, TAS' website. It can be a resource for the original poster. And, I did point out I had just purchased an NAD integrated. I'm familiar with Cambridge's sound synergy between their amps and cd players: I'll say it again. The CD player will be slightly laid back, the amp slightly aggressive up top. Having owned both, it is germaine to the subject to point out, as you yourself brought up, the synergy of systems.
You castigated another poster for not having heard both: that doesn't hold true in my case. What I didn't state clearly enough is that, while I did HEAR the (Cambridge) amp, I didn't BUY the amp, only the CD player. I"m sure there are others who've heard the amp longer than I did, and I would defer to their more extended experience. I don't think 3 days is enough to hear everything that is going on: otherwise, reviewers could write a review in 3 days!
However, when I, personally, say I have "experience," I don't mean in a store, where I have no control over the room, electrical outlets, line conditioners or electronics or speakers - or anything else, for that matter. I take home, and listen over the course of a weekend, to a component. MOre likely, I also mean "I bought the unit." (But not the amp, in this case). I didn't hear the amp as long as the CD player obviously, but I remember its sound.
Sorry for the confusion: I could have stated it more clearly.