+3 Innuos Zen Mk3. Darko has an informative video review that I found to be pretty interesting and fairly impressive. As good as the Node is, this seems like a significant step up in every way if you’re looking for an upgrade.
That said and as good as the Zen is, this streaming stuff is still in its infancy so I’d be a little concerned about committing significant $ at this point. You might actually get a bigger improvement by putting upwards of $3k towards an excellent DAC, and you can enjoy that until the streamer market matures a bit. I don’t think you’ll go wrong with the Zen, but it’s just which path makes more sense given the current state of things. Best of luck in whatever you decide.