Hi -
I have the Version II of the Billie amp. Would never go $3K for the amp, so version III is a non-starter.
As for the Denon, the one that caught my eye was the PMA - 1700 NE. Quite frankly, I have been a bit frustrated with the hybrid amps and really didn’t want to go for $3K for a second system. Note: I usually buy new. I also wanted built in phono, if I could get it.
Rich
Amazon has the Denon on sale for $300 or so off.
https://www.youtube.com/watch?v=cnO2cBQ4hy4&t=357s