I've heard the Bacch and it was impressive (I did not know it could work as a streamer, they showed it as a dac) but especially with their own 3D processing. You need to decide if that is something you want. As you already have a good dac it seems to be a waste of money otherwise.
A streamer I did not see mentioned yet is Métronome. For example their Métronome DSS.
My main worry with streamers is that they are basically computers and uses a lot of software. This may have to be updated in the future to work with later things. This means a stable company or brand is probably especially important for streamers. Or just go with a computer and install Roon Rock.