Welcome to Club Sparkos! :-)
I'm listening to some Acoustic Alchemy tracks at the moment, with my Spakos-empowered PB2 > DT880 600 rig. Yet again, starting the day with my first cup of coffee and fresh ears, I am still amazed by the Sparkos SS3602.
I know you're not a fan of crystalline detail - a la OPA1612. I, too, have grown away from that, somewhat, but as you've hinted, the Sparkos offers resolving power without brittleness.