Most of the time I'm using my McIntosh C2300 (with NOS ADZAM tubes)
Once in a while I swap in my vintage Marantz 7T just to justify keeping it.
I find both pair well with the XA30.5, and feel I've reached the end game with my core components.
Let me know if I can answer any other questions. I look forward to hearing your thoughts on the XA25, so please share when you've had some time with it!