I took a chance on a used pair of Audions because they don't come up that often and I wanted to hear them. Count me highly impressed. Totally black background, very fast, neutral tonal balance, good spatial representation - I do think they are revolutionary. From my perspective, the current top contenders are the AGD and Atmasphere Class D amps (Ralph, I may be giving you a call). I would love to hear Ralph's Class D amps and the Vivaces as well. The AGD Audions sound great with my VAC Signature IIse preamp and my Tekton Encore speakers. Have yet to feed them into my Avalon Eidelon Diamonds.
Would love to hear people's experience of the Atmasphere Class D. From what I've heard, people who have heard them very often end up buying them, and they are flying off the shelves...