I would second what most are saying. Don't cheep out on the DAC. Personally, I would have just gone with something like a PS Audio DirectStream Junior. It has a built in streamer and wonderful paired with Roon. The warm sound that it produces, brings it really close to sounding like analogue. It nearly matches my analogue front end that cost 4 times more!
You might be able to find one used for $2-2.5k.
The Lumin streamers are also highly recommended and come with built in DACs. Only thing is most of them don't offer inputs, if that was a consideration. I've not heard a Lumin, so don't know. Just have heard they are highly recommended when a single box streaming solution is desirable.
Outside of that, I might consider something like a Chord or Mytek DAC. Once you want to go beyond that -- say a DAC of $4 - 5k -- you need a big price jump. And probably paying for the output stage. The money might be better spent on upgrading amp or other.
You might be able to find one used for $2-2.5k.
The Lumin streamers are also highly recommended and come with built in DACs. Only thing is most of them don't offer inputs, if that was a consideration. I've not heard a Lumin, so don't know. Just have heard they are highly recommended when a single box streaming solution is desirable.
Outside of that, I might consider something like a Chord or Mytek DAC. Once you want to go beyond that -- say a DAC of $4 - 5k -- you need a big price jump. And probably paying for the output stage. The money might be better spent on upgrading amp or other.