The Zen Stream has been working well for me, and over the past year, I’ve experimented with several DACs alongside it, including Zen DAC v2. I ended up returning the DAC but I think personal preference plays a significant role. I’ve kept the Schiit Modius, as I prefer its particular house sound signature. I recall the Zen DAC being somewhat lean in the mid-bass and bass notes regions.
I recently bought the everSolo DMP A6, and in terms of being a streamer, it outperforms the Zen Stream. Particularly at low volume levels, I noticed that the soundstage didn't collapse with the A6 compared to the Zen Stream. Additionally, the A6 showcases better soundstage depth and instrument separation. I find the A6-Modius combination more preferable than the analog output from the A6's internal DAC.