If you're ever on Big Island I'd be happy to meet up so you can have a listen. I have them all (almost) accept the Aeolus. Your DAC-amp setup sounds pretty great and I've enjoyed all my ZMFs even straight out of the Hugo 2.
Short of the Orpheus, the Verite Open were the most amazing headphones I've heard until the Closed anyway. Why are they good? Incredibly detailed, large soundstage but not extreme as the HD800 series. Very full and enveloping sound, certainly far more than the HD 800 SDR I have. I think the Auteur is nearly as good, but quite different and more similar to your 800S than any other ZMF. Given the lower price and your uncertainty about the Verite, I'd recommend the universally loved Aeolus as a first ZMF (though I prefer the rest of the lineup, aside from the Eikon, which I've not heard but will before too long). Alternatively a used Verite Open, as you can almost certainly get what you paid if you quickly want to re-sell them.