Streamer's without built in DAC options?

What type of streamer do want that works with the Nucleus? The Nucleus is a streamer... what are hoping to accomplish?  The term "streamer" means different things to different people and the capabilities of various streamers varies widely. For instance ......

What type of outputs do you need, just ethernet, spdif, usb or ???
Do you need internal storage, need to attach USB drives, just access NAS?
Does it need to be a Roon core like the Nucleus or will you use the Nucleus for that?

I see your DAC has a full complement of inputs, how do you want to feed it? As a Roon endpoint using ethernet or use the USB or one of the other digital inputs. 

Your question is too vague to answer properly.

I see Unsound has the same question I do which hinges on your vague request.

OK, forget about vague, how about your question makes no sense?

You state in your post you want a streamer without a DAC to work with your DAC and your Nucleus, but the Nucleus is already a streamer without a DAC. So it makes no sense to say you want a streamer without a DAC to work with your streamer without a DAC.

So do you want it to work with the Nucleus like you asked which makes no sense, or do you want to replace the Nucleus... because you don’t need 2 streamers.

so again, since now that I think about it your question is very vague. What are you trying to accomplish? What is it about your current system that isn’t doing what you want so suggestions can be made for ones that will? Why do you want 2 streamers? And again, your DAC will accept just about any manner of connection you can imagine, so do you want the DAC to be the Roon endpoint, or are you looking for another endpoint to stream to and then feed the DAC.

How come no one mentioned the dCS network bridge?

it isn’t a streamer, you to stream to it, not from it

I also see many recommendations for streamers that aren’t Roon servers. assuming the OP wants a Roon server given he is using a Nucleus,

of course.. given the very vague stated needs, we don’t really know