I’m owning also a SR25 and I don’t expect, that it will become in the future a Roon endpoint, because the WIFI performance isn’t great (only 2,4 gHz).
Also for the SP2000 A&K decided to allow “only” DSD64 and PCM 192 through RAAT with the argument about the WIFI…
My meaning about the A&K DAPs: Really good for playing local files, but not ideal for streaming (AKConnect allows no gapless replay as DLNA client!).
And all the people, which are meaning, that android based DAPs are sounding good with Roon, while resampling: Take a real good Headphone or IEM and compare it with Roon-Ready devices. For me, there is a great difference in the SQ and I don’t have golden ears.
For a cheaper mobile solution, I’ll preferr a iPhone/iPad + DAC package.