Apple iPad music streamer

My system uses an iMac via USB to a HOLO DAC and sounds incredible to me. Guests always comment how great sounding the system is.

After many times reading about others that switched from iPads, Macs, pc, to dedicated streamers, with noticeable improvements, it's time to erase the question in my mind. 

Ideally the streamer I need only does one job.There is no need for storage or disc components. Sadly my CD collection is gone however I'm very satisfied with Qobuz/Roon as a replacement Most streamers I see are paired with something and I am looking for a suggested device that is an improvement over my iMac DAC streaming without any of the noted.

Purchased used Pro-Ject Streambox S2 Ultra for $550. Holo KTE dac's prioritize usb connections and this streamer fits my bill exactly. Seller lives nearby so this transaction should happen quickly and I will finally know if a device in the chain between iMac and DAC is appreciable.