cartridge selection

Where do I start?

Maybe it's best to draw an analogy that is easy to relate to. Certain critical parts of the design of a race car will allow it to stay on the track - to allow the driver to not fly off the road - mainly, the tires, and suspension.  THAT is the cartridge in your analog system. It is KEY.

The engine and transmission - that's the preamp, amplifier, turntable and speakers. Power, and consistency, smoothness (lack of distortion). But none of them will help you stay on the road.