Power cable suggestions for Pioneer turntable

@ten_ton_bass I had several turntables. Always stock cord. It powers the motor. As long as the motor is working as designed you are good. 
And by the way, I use Nordost and Audience power cables throughout my system where they matter - digital, preamp, amps. I’m not one who’ll tell you power cords make no difference. But where you’re looking to upgrade is equivalent of expecting your car to perform better if you’re wearing a more expensive cologne while driving it. 

Power cable for the motor will not change the way your turntable sounds. +1 on seeking a cartridge upgrade. And look elsewhere in your system and room acoustics for a solution to this problem. 

One other thought…is the cartridge setup proper? VTA, overhang? It can make it or break it. Use a good protractor to verify your setup.