Hi Peter.
I used to own the Xono and it is a great phono.
Differences between xp15 and xp25 was more realistic and musically satisfying in every music cliche, depth, soundstage, extension, focus etc a c.
Most obvious is the sense of urgency or vibrancy when music is played, but never sounding hurried or artificial. A sense of ease and control at the same time.
Only downside is the xpo-25's susceptibility to power supply interference. My cj GAT with its large pose transformer made life difficult with him coming through the speakers. With some component moves and the xp25 PS being as far away from the control unit as the cable is has given me silence.
It has been too long since I had the Xono for meaningful comparison vs xp-15 however from memory that ease of delivery seemed to be there with the Xono.
If I was in your shoes and looking at upgrading your phono worth Pass, the xp-25 would be the only option to consider.
