Listening to the Auryn's Op. 54 with Sennheiser HD-650 headphones, the resonance does not seem excessive to me.
That is what I use for headphones as well, after down grading from a Stax SR-009 system since I wasn't using it much. Quad ESL57 or Harbeth SHL5 for speakers. At least for me overly resonant recordings are more annoying on headphones than on speakers. Like one particular pianist that recorded truly exceptional Chopin Nocturnes
and Mazurkas, both recordings are resonant so I pretty much never listen to them on headphones.
Back to Haydn, I've now caught up on Hurwitz's "Haydn Symphony Schlep", of all his videos his ones on Haydn are the most interesting to me as he knows the music very well and has quite the enthusiasm for them. And finally getting Dorati's cycle, I don't know why I avoided Dorati or never even bothered sampling it in the past... it's Dorati, he wasn't going to drag his feet in Haydn ala Bohm or Karajan! I think too much average to below average non-HIP in the symphonies just had me burned out on wanting to hear more. But this has the verticalness and pacing of my favorite HIP performances with more meat.