If your phono stage is SS then its between upgrading that and the cartridge. I don't know what it'll cost in Oz but the bargain here (and maybe even outright champ) is the Herron VTPH-2A. Not a pure tube design but you can be sure anything harsh you hear is not coming from the Herron!
But really, before buying anything you should spend some time trying out as many things as you can get for audition. At the very least it will help to ID which of your components is contributing what to the overall sound you are hearing.
But really, before buying anything you should spend some time trying out as many things as you can get for audition. At the very least it will help to ID which of your components is contributing what to the overall sound you are hearing.