Next round with the Peachtree - it is MUCH better than last time. I must have tested this at just the wrong time. Cycling through speakers and still has a tiny bit of etchiness in the treble on the Perlistens. But noticeably better. Still don't like it with the Vivids or Verdants. I can't call this amp neutral but it is nowhere near as bright as it was two weeks ago.
I spent two more hours testing this. It is fine. Sounds good but I legit don't get the giant killer mindset. Maybe it needs another week? Maybe it is the speakers I am using. It's a good amp. Just not elite and certainly isn't competitive with cost-no-object gear.
I am curious how this has evolved for other critical listeners. The one big caveat is this amp is dryer than I like. I much prefer a more liquid and tubey sound so this is definitely a poor match for my taste. It is like asking someone to judge a peated whiskey when they prefer Speysides. I can offer an opinion but if I dislike it somewhat fundamentally, it is tough for me to be fair.
I have a notes on this listening session I can post but opted not to as it was just too wordy.