@garebear I'm surprised you even considered selling the Grandioso K1X for the DP770.
That's a massive downgrade in my opinion, the DP770 that I heard did not come close to my own K03XD, and I can't imagine even comparing that to the Grandioso, which are 2 levels above.
I'm not talking about just details or low-end extension (where Esoteric has always excelled at), but also every other parameter including soundstage, imaging, depth, width, air, layering, microdetails and spatial, ambient cues, speed, transients, attacks and decay. Esoteric was better in all of these traits.
The Accuphase does have a beautiful sound, tonality and timbre-wise. But I wouldn't sacrifice all other parameters just to obtain this 'polaroid-like' presentation. It also depends on what music you listen to. If it's just unplugged, acoustic, jazz stuff, and you're all about musical enjoyment (whether truthful or not), then the Accuphase works for sure.
The Esoteric Grandioso K1X plays in the league of MSB and DCS with its new discrete DAC, and many user reviews have indeed compared it favourably to these digital giants. You're already close to the end game, imo.