Budget streamer/DACs are fine value propositions for many people. Especially those wanting a "clean" minimalist system.
Re: Take a skinny girl to a restaurant and give her a decent steak and she’ll be happy.
And the question the OP asked is a good one.
But in the context of this forum, I would expect 90% would consider an external DAC of their own choosing instead of using the "convenience DAC" included with the streamer.
That makes is harder to know without having real world experience.
For instance, A British Audiophile mentioned that the Node Nano was the best sounding sub-$1000 streamer/DAC he had heard, but that when paired with an external DAC via USB, it was "so-so" sounding, so he used one of the SPDIF connections instead to an external DAC for better sound.
Just means that you can’t replace real world experience with just specs.
I have a budget WiiM Ultra and for the price, it sounds pretty good. But I’ll get a Schiit BiFrost 2/64 or a Denafrips Enyo 15th eventually to pair with it (and probably a DDC, since the clock in the WiiM devices is their weak point). Would like to have tried a Node Icon "standalone". Maybe an external DAC and DDC wouldn’t have to be eventual upgrades then and ultimately been less expensive.
On a side note, Schiit has upgraded most of their DACs recently to use Forkbeard. Some reviewers (if you can believe them) say the $299 Mimir DAC, which replaced the Modi Multibit, sounds better than the $829 BiFrost 2/64.
Hopefully Schiit will revisit the BiFrost next year and give it the Forkbeard treatment and upgrade its sound to be clearly above the Mimir.
All I can recommend to the OP is to try auditioning a few "budget" streamer/DACs and let your ears decide. Or keep saving and buy something upmarket, new or used.