Do you belong more to souce first or to speakers first school of thought ?

I have one non-negotiable.  SET.  So amp first, then speakers to match.  The source is fungible.

Speakers first then an amp to match.

Speaker synergy with amp is the 1st step in creating a HEA audio system. Preamp over source. I know this might upset vintage or budget conscious buyers but when you skimp on electronics, speakers and source components can not reach full potential.

No one remembers Ivor Tiefenbrun, founder of Linn, "Garbage in, garbage out"?  You can't improve what you don't get/can't get rid of any added distortions from what comes off the record, cd etc.  I've found that as I've upgraded my source, I get more of the artist's intentions, lyrics, instrumental lines, etc.  Of course electronics, cables, speakers, room matter, but you have to start with a high quality source.

The speakers are what I'm actually hearing, so I'd possibly be speakers first, but if the source of what the speakers are playing is faulty. "Garbage In, Garbage Out", or 'GIGO' for short, btw, is an old, old expression - used it with IT along with other systems that take something in and spit something else out, for many many decades. Nobody at Linn invented it.