can you explain the difference between the art9xa and art9 xi?
Different stylus tip, output, compliance:
art9xa specs (Shibata / 0.2 mV / 10cu @100Hz)
art9xi specs (Special LineContact / 0.5 mV / 15cu @100Hz)
For your tonearm with stock shell the XI is probably better. I’m sure you must be happy with ART series.
What about these two compared to the Dynavecter DV20X2L?
Can’t tell you this, but if you like Dynavector I’d recommend KARAT 17DX with Diamond Cantilever, it’s something special!
P.S. Those ART series and Dynavector are later models than my ART and my Dynavector Karat. You can’t go wrong with any of them, especially if you're comparing them to your retipped Denon 103.