Sorry, I've been a little snowed under with commitments so I've just been listening to them passively rather than anything critical. I guess that says something in itself.
So far im really impressed with the soundstage and bass presentation. Really quite nice stereo separation on these and I felt it got even better when I tested it through balanced. Not quite holographic like Solaris but these have great left - right positioning and imaging. If I were to pigeon hole these I would say that you were pretty much on the money in labelling them an Atlas+. They strike me as a "grown up" Atlas. Theres definitely an added dimension thanks to the BA. It injects that clarity and definition that was missing from the Atlas in the upper registers while leaving the awesome DD to do the heavy lifting. And to clarify, all of the hallmarks of the Atlas DD is here, great meaty textures, deep reaching and it sounds BIG. Thats another thing that struck me when coming from tubed models such as Hero, you have got to love DD's and BA's being able to do their own thing without tubes. There is just something about it that makes the music sound authentic.
Another thing that I was concerned about and what I loved about Atlas was that warm, powerful feeling that the DD was able to inject into the music while still being detailed. The Dorado pushes this up a notch in terms of technicalities (imaging, top end detail) while lowering the bass quantity ever so slightly, its still got that nice analogue warmth to it but it's slightly more civilised.
Compared to the Solaris SE, the best way I can describe it is that in the Solaris SE the BA's sound like they are doing most of the heavy lifting while the DD is relegated to the mid / sub bass for tactility purposes mostly. In the Dorado 2020 the DD is left to have more of a free rein (in both the frequency response and in upping the quantity) and the BA is just left to inject that added definition and clarity where its mostly needed.
Solaris SE = BA's + added DD
Dorado 2020 = DD + added BA