I'll echo what a few have posted--if you are happy with the XX2 why make a change? Unless mistreated that cartridge should give you many years of service. If you are looking for a change what sonic attributes are you seeking? That may help guide the contributions. That said, I recently installed an ART 9 in my Scout and am quite shocked at the performance of this cartridge. I've run four different Dynas (20XH, 20XM, 20XL and XX2MkII) each was fine in their own way and a good match for the JMW9. More recently I ran an AT OC9MLII which was surprisingly good for the money--better, in my view, than all the Dyna's but perhaps the XX2MkII and also well suited to your arm. The ART 9 is remarkably refined and even handed, very neutral, spacious and dynamic. More than any of the other cartridges it just sings without imparting any signature of its own. An extraordinary buy and certainly worth your consideration should you wish to replace the XXIIMkII. Best with your search!