Well, I have used Adcom with an older pair of NHT's once upon a time...
but I can tell you, the NHT's would without a doubt perform better with higher end electronics...
I disagree with your formula. I feel that source and pre-power should be of utmost concern, with speakers being a bit 'lower on the food chain'. My rationale for this is that no matter how good the speaker, it will only reproduce what it's given.
I'm not sure why so many people discredit the NHT's. Under the right conditions, they can be really, really surprising. Very razor-sharp and detailed. They are built to be very precise, which is their claim to fame. They are also imaging champs. No offence, but I find most people who discredit them have not heard them with the proper equipment or have not heard them at all.
Without a doubt, the NHT's CAN and WILL benefit from electronics that are a notch up from Adcom and Parasound.
So, in a nutshell, the Primare is more forward sounding than the Classé? Is it more open and airy? I was not particularly thrilled with the Classé CAP101 until the MSB link DAC III was coupled with it.
But i want an amp that can stand on its own merits and not have to rely so heavily on source equipment, if you know what i mean.