Not sure I want to go class d.
No reason to not go to Class D. The only reason old or cheap Class D was/is bad is because the switching frequency wasn’t/isn’t high enough. PS Audio for instance uses an ICE Class D for their M300, ATI also uses Class D.
Look up reviews, the NC400 is vastly superior to basically everything else for the price.
Datasheet: https://www.diyclassd.com/img/upload/doc/ncore/nc400/Documentation/NC400_04xx.pdf#page11