Thanks for your excellent recommendations! I did try dCS LINA headphone amp with a few high-end cans and it had promise. I ultimately purchased Naim Uniti phone amp and Meze Elite cans, but even with equalization the sound was too much "inside my head". The Roon equalization is lifesaving, very versatile, has a remote app, but i still needed to equalize vinyl and cd playing. The Trinnov Amethyst has excellent versatility and room correction (that's more for my friends). Thus, most things can be made "flat", and I still enjoy imaging and such. The timber of some instruments and choral pieces is distorted by my ears - nothing helps that. Still, live and reproduced music is quite enjoyable - just not audiophile quality - and I can live with that!
*While I'm at it I will highly recommend a couple recordings that are superb: Truro Cathedral Chorus performing Dobrina Tabakova's "Of a Rose We Sing" is a gorgeous choral recording with a foundation of organ (divine!), and an album named Postcards which includes "Pueri Hebraeorum" (beautiful cathedral space filled with 2 men's choruses, one in front of the other, echoing the verses). They are among the best recordings!