any suggestions on what to replace Bluesound Node 2i with

I’d back up and re-think your architecture. Problem #1 is that you really didn’t describe one. Exactly what functions is the streamer performing? How many DACs if any? Where? How connected?
This has huge impact on whether the streamer makes much difference at all. It also has a huge impact on, if it DOES make a difference, if power supply changes impact it (or isolation or ....).
I strongly suggest a dedicated library/streaming machine, like Roon or your fav, somewhere away from your system, plugged into a different outlet, and fully isolated by your network. The add bridges that handle the local network termination and deliver USB to your DAC. Make sure the DAC’s USB is isolated, OR the streamer has clean power to its USB output, OR both.
Ensure very hgih quality (re-) clocking at the DAC.

At this point the streamer brand will matter very little.
I will say that the Node, as a full streamer/DAC is pretty mediocre. Easily beaten by many $99 DACs.

G

OP, just to chime in. I went from using the Hegel H390 as a DAC and streamer to using the T2. OMG, what a difference. Even before I broke in the Lumin T2, the SQ was breathtaking. Suddenly I could hear each instrument unfold separately while at the same time, every piece of the music came together. After running it 24/7 for two weeks, the sound was even sweeter and more complex. 
I second comments of @rajivhifi.I will add that I replaced the stock cable with one from audiosensibility - which was definitely part of the equation.

Can you really here a difference!  Even if you do a blind test.  A dealer told me a Belcanto sounds better, but no one talks about Bellanto.  If so what causes the sound difference?  Is it clock speed.

The Anthem 1120, I believe, cannot use a different DAC. I was recently told by Anthem it doesn’t matter input you chose with the Node and it doesn’t matter what DAC you chose you get the Anthem DAC. I’m probably wrong but I would find out.

Duffy

Can you really here a difference!  Even if you do a blind test.  A dealer told me a Belcanto sounds better, but no one talks about Bellanto.  If so what causes the sound difference?  Is it clock speed.

https://www.youtube.com/watch?v=tJIj0Acq99o&t=245s

the raspberry pi is used here as the case study but the general points answer your query