Upgrade turntable, arm or cartridge?


Looking to potentially improve my analog setup.
I am finding that my highly modded Sony SCD-777ES sounds better than my turntable.
I have an Oracle Delphi Mark II that is modded and also has an Origin Live motor and the Beefed-up Power supply.
Eminent Technology ET-2 arm with WISA pump and surge tank
Van Den Hul cartridge. Grasshopper IV GLA.
Where would I begin? Turntable, Arm or Cartridge?
What would you consider to pick as replacement?
dcaudio