Yet I might invest in a better cart one of these days.
@boxcarman If you are listening carefully and without bias, I think you'll find that the ability of the arm to track the cartridge correctly is far more important than what cartridge you have.
Of course to do that the cartridge must be compatible with the arm; it must be a proper weight and have compliance such that the cartridge mounted in the arm will create a mechanical resonance between 7 and 12Hz.
So you can't just get any cartridge that might be more expensive; if a cheaper cartridge is more compatible with your arm it will sound better (as long as you've also paid attention to proper loading if the cartridge is MM and high output).