Generally, based on my extensive experience, stand alone DACs always seem to out perform integrated DACs. I use an Ayre Acoustic QX-5 Twenty DAC with my Hegel H390 with stunning results. Using the internal DAC that came with a component is usually, as with you, a cost saving measure.
Streaming with the Hegel H390
I recently acquired an H390; pairing it with Wilson Sabrinas. I stream directly with the H390. It works seamlessly with all the working parts in one unit. Frankly, I can't imagine getting more for what I spent.
While the digital setup in the H390 is top notch, I have noticed that many of the reviews of the H390 pairs it with a separate streamer/DAC. So my question is, at what level of upgrade would it be worth the squeeze to just let the H390 be an amp and invest in a separate streamer/DAC?
Thank you for your input.
Gary