Best Streamer for External USB Dac

I have both a microrendu and an ultra Rendu.
Both unfortunately have the same weak spot.
Power outages.
This can And has on both of mine fried the sd  card which renders them useless.
And here in Florida we get a lot of power outs.
Ofcourse now I know this a UPS behind them should help.
However at $29 a sd card it’s a lesson learned.
That said yes the sq is pretty darn impressive for what they are.
i ran mine into mhdt Orchid dac via usb as that is the only audio output they have.

Lumin U1 mini.

+1 for Roon Nucleus for handling both Roon Core and Network player duties via USB Cable to your DAC of choice.  I have my Nucleus hooked up to Chord Qutest via Curious USB Cable.  Nucleus also has bay that can be fitted with an SSD, so it can handle NAS duties as well for your system.

Do you have many downloads? If so why not get a Nucleus (since your using Roon). Connect your DAC to it and let Roon/Nucleus handle the streaming. I’m very happy with my Nucleus and my MHDT Orchid combo with Roon. 

I’m a SoTM SMS200 Ultra user and have it with the SMS500 power supply also sold by SoTM. It’s a great sounding network streamer and I believe sells for about $1,200 new. I found a used one with the power supply on A’gon and have been super happy. For me, this one replaced their less expensive SMS200 version (not the "ultra" version) so I was already familiar with the great sound.

Most of the more expensive streamers are no-doubt wonderful but you’re paying for the music player software as part of the purchase price.
With simple network streamers like my SoTM or the equally capable Sonore ultraRendu products don’t provide playing software but both work great out of the box with Roon and or Audirvana and half a dozen other software options.

Lumin U1 Mini...

You could get a used Innuos Zenmini Mklll with upgraded power supply (important for best sound) for about $1500 or a used Zen Mklll for about $500 more.  Best of luck. 

Budget??

I highly recommend an Aurender N100H.

New about $2500, some great used deals around for much less.

Check out any of the Bryston units.  All three generations are very nice.  I've had a lot of problems with BlueSound and WiFi, so I am looking to sell the stuff off.