Epilogue.
Took one 7300 to my place, listened for a couple of weeks and decided to keep it.
Why I keep it: Larger sound stage, better microdetails, better dynamics, in my view.
Why I should have kept the A70: was a lover of class A sound (not anymore; I mean, I still like it, but I also like the class AB sound, now). Probably a blacker background, a touch, a little touch.
That's how the story ends, for me, for now.
To be continued in a couple of months with a DP750, already ordered. And a finer preamp, end of 2019.
Over and Out
And of course, "Happy Festivus!" (for the rest of us :P)