Cayin is releasing the N6ii but it will cost more than 800€ for sure, so a modern entry level DAP from 150-250€ would be great.
So basically an N3ii with Streaming and AptX-HD etc. I'm sure Cayin has something in the pipe for this, and seeing as the N6 was released before the N3 it stands to reason that the N3ii is next in line.