Thanks for your comments. Please note that La Voce is SS, not tube. Only La Scala is tube in the Aqua line up.
All cabling is Audio Art Statement. @jjss49 has offered to lend me some other cables. I prefer to start the experiment with only one brand of cable in the system and not introduce another variable but may take him up on his offer. We’ll see.
It is never bad advice to spend sufficient time listening before making any decision. Having said that, my conception of musicality demands generously-voiced mids. Absent this, I’m simply not fully engaged. Although the Aqua is far from perfect, it is not lean.
I now believe that what I’m mostly enjoying from listening with the Hagel DAC is less due to its inherent sonic character than an absence of fatigue others have suggested is due to noise/jitter.