Next upgrade?

What should be my next upgrade?

System:Origin Live Aurora TT, with OL Silver Mk 2 arm, Ortofon 2M Blue, OL speed box, Musical Fidelity 3.2 int. amp, blue jans cables bi-wire, Jolida JD9A pre phono, Usher X719 speakers.

I'm leaning toward upgrading my cartridge to something with more detail and air. Maybe a MC cartridge in the $600 price range?

Thanks