I think the pma 800 Ne is a little better.
Because it has no dac and can determine the dac itself.
If you have one, it’s a good combo to have a little influence on it.
The Pma800ne is indeed neutrally tuned in the overall picture.
But with the digital input it’s really perverse.
I have connected the Singxer Su2 digitally and it’s really good.
Recently connected my custom hybrid amp analogue via the preamp output and also pretty damn good.
Almost better than digital if I’m honest.
The 600 was also on my list but the dac bothered me.
I was worried that it would really work on stereo systems and that Denon would do its homework.
But it also looks damn good on paper.
Have fun with the 600, .