Dear Loreliv: You already have one of the best cartridges out there the XV-1s.
Your phono stage is a very good one and if you are not satisfied with the XV-1s quality performance IMHO it is not because your phono stage but maybe because the tonearm match, set-up, load impedance or all these factors.
What do you not like about the XV-1s quality performance?
Regards and enjoy the music.
Raul.