Dear Axel: You really have a very good audio system, especially your analog rig and loudspeakers.
You have one of the best turntable/tonearm combos ever made. Your tonearm was designed to do sinergy with the TT: what's wrong? what are you loking for?. If you swap your Simon Yorke tonearm for other one ( it does not matter which one ), maybe you can have a different sound presentation but I'm not sure if that different sound presentation will be a better one, that depends if the new tonearm do a good match with your cartridge and with the TT. Here are many: if, if, if,....
If you are looking for a better quality sound reproduction, then you must to go for the Allaerts MC2 Finish, here you will have not only a different sound presentation/reproduction but a better one, that's for sure and the Allaerts is a very good match with your TT/tonearm combo, here there are no: if, if, ...
Regards and enjoy the music.
Raul.