Dear tgonzalez: Very good stuff you own. I know very well the 90X and is a very nice performer.
Now, if I was you what I would like to change will be both: tonearm and cartridge. First step a diferent tonearm and listen with the 90X and after this decide if the 90X has to goes too. At this moment I don't think in " touch " the TT, tonearm and cartridge can make a more notable diferences for the better you always in the future can up-grade the Michel to Orbe status.
Regards and enjoy the music,
R.
Now, if I was you what I would like to change will be both: tonearm and cartridge. First step a diferent tonearm and listen with the 90X and after this decide if the 90X has to goes too. At this moment I don't think in " touch " the TT, tonearm and cartridge can make a more notable diferences for the better you always in the future can up-grade the Michel to Orbe status.
Regards and enjoy the music,
R.