I really appreciate all the comments and suggestions here!
SO my understanding from all this thread is that the biggest impact in sound quality is the preamp, and the amp would bring the juice. If I were to have separates amp and preamp, the 4 options are:
1- SS amp + SS preamp
2- Tube amp + tube preamp
3- SS amp + tube preamp
4- Tube preamp + SS preamp
In my case, having ATC 85 dB sensitivity, i would need an SS amp and if i want some tube characteristics, a Tube preamp.
I did not add the option of a SS CLASS A vs AB amplification.
Just one clarification, i am not married to tube sound, that is to say, the whole point of thinking about tubes is to counter-effect the extra clarity of the ATCs. Meaning, from what i have read, going for SS amp and preamp in AB would bee too much hardness. So the tube option came into place. BUT need to clarify i still like clarity, not in a way that is going to drill into my ears though.
So for example, the combination: a BAT or Prima Luna preamp with a Krell, ATC or Pass Labs amp, would be a good combination, right?
SO i guess a tube preamp with a class a amp is the best option for now.
So now my question is: what equipment specifications would indicate the best synergy between them?

