Thanks for the detailed review.
Your comment on the soundstage issues of the Dusk in analogue mode are interesting. I have a B2D and always found the soundstage to be quite messy. A bit of playing around on Squiglink and with the resulting EQ that brings the B2D’s frequency response largely in line with that of the Dusk:Default the soundstage is much improved. There’s now quite defined instrument placement and symphonies are a much easier listen. The flipside is that some of the “detail” is lost, but it’s worth the trade off.
So I’ll hold off on a new purchase and enjoy the new life that the B2D has got.