primaluna gear, avalon eidolon speakers, cardas

The primaluna gear is outclassed by your speakers and cables.

Consider a preamp with some voltage regulation, and a power amp with some gain stage regulation. Regulation is conducive to warmth and sound stage stability.

The Chinese "classic" designs won't cut it with Avalon speakers due to the need for high current stability (they are not efficient)

-Avalon owner for the past 18 years

Avalon speakers are internally wired with cardas wire (at least the old models like ascent, radian), don't know if the still using it?

It is only copper. For example Monitor Audio Platinum is wired inside with pure silver. They use the best WBT connectors worth of 450 dollar.

It is not that special what they use.

Still using Cardas, per my Eidolon and Eidolon Diamond.
I don't believe in wires at all....well that's an overstatement, I play with wires in moderation.
Start with a baseline of Canare Starquad cheapies,
if the system doesn't sound good and you absolutely need esoteric wires with voodoo boxes of choke and caps or alien material to compensate, something's wrong.

In my experience Cardas works better with Avalon compared to MIT. Because they have those properties which an Avalon is not that good at. Avalon ( I sold it for over 6 years) has a wide an deep stage. But within this stage the individual focus of instruments and voices it not thar sharp. Cardas is very good at individual focus in instruments and voices. You get a better endresult.