STREAMER - WHERE DO I GO FROM HERE?

I started down the same path as you where the eversolo was my starting foray into digital audio as I built my 2 channel audio setup.  After replacing interconnects, speaker wire and power I first changed my dac to a Weiss dac501mk2 and used the a8 as a steamer.  It worked well enough but I also thought I was missing something.  I had remembered my local audio shop was going to begin carrying lumin so I went in for a demo.  I ended up purchasing the lumin U2 and it has been a huge upgrade.

Since you mentioned Grimm as an option I’m using the MU2 and the SQ is just outstanding.

the unit you have is actually better than most people realize. It's just being held back by a terrible power supply.

fix the power supply and you'll be surprised and how far above its price point it ends up punching.

Head to head, a lowly A6 w/ a proper supply beat stuff in the 5 figure range.

 Considering that the DAC will do all the heavy lifting as far as clocks, buffers etc. Your new DAC should be able to handle this with no issue. I would use the USB input and keep the Eversolo. Unless you want bragging rights on a shiny new streamer. From my experience with 5-6 Streamers now you won’t hear that much difference between a more expensive streamer over the already good Eversolo. It’s the DAC that if not designed well will show differences in streamers not the other way around.

@soix 

Ditch the screen as it’ll greatly limit your options

I wouldn't buy anything without a screen and remote again. After 7 years, they're no longer obligated to provide a new software for your new phone or tablet. It'll be a brick unless you keep an old phone around that only works for a few minutes before the battery dies. I have problems with Pioneer / Onkyo for this reason. It's a horrible company. I have B&W subs that will meet this fate.