I had an STR Preamp for quite a while. I used the Auralic Aries G1 with it happily. It’s a high quality, reliable streamer without a DAC. At this point, you would have to buy one on the used market.
What software do you intend to use? I use Roon, and the Auralic is Roon Ready. It works with most everything, including their own Lightning DS, which runs on an iPad.

