@jimsharpe - I replaced the cable on my old Rega II turntable and the improvement was well worth it
I’ve since replaced the Rega Arm with an Audiomods arm with a one piece harness and again the improvements were well worth the cost
So from my perspective upgrading your cables will bring significant improvements for what is a relatively easy upgrade.
Then you would be able to hear what a cartridge replacement would do for your system, but without good cables you are only hearing a small fraction of the music on that cherished piece of vinyl
Take a look at Zavfino phono cables (similar to the Lynn "T" cable), Starting with the...
Regards - Steve