I personally cannot recommend the move to the N10, you would gain a better clock, but I doubt you would find the musical improvement you seek with this change. Instead, I would recommend you look at DDC’s that accept USB in, and offer AES out. This would give you the better clock assuming you invest in a good DDC, and let you test the AES input on your DAC, without upending your streaming world.
I would also highly recommend the WireWorld Platinum USB and the Acoustic Zen MC2 AES cables. These are both OCC silver and will make the best of the digital components.
A good streamer is important, but I am not convinced that they have a significant effect on the musical nature of your system. A poorly designed one can certainly be a detriment, but the Eversolo seems to be a decent unit. Jitter and noise are the enemies of the streamer and a good DDC and cables should provide the best possible signal to your DAC.