I don't know if I would say that the cost of recabling with an expensive cable is worthwhile, but it is very easy to balance the stock cable by just adding the appropriate connector. That only costs a few dollars. As the HiRose connector is not real easy to work with, I would just buy the iBasso pigtail connector and use a standard XLR 4-pin connector on your KSC75.
I can't answer if it is worth it though. I like mine balanced but I have lots of time to tinker and play with wires and gadgets. The TWag cable on my KSC35's was a joint experiment between myself and Craig with the wire first was introduced.
Ron, I'm always up for a challenge, but is it seriously worth the cost to have a pair of KSC-75s balanced ? I have a pair on the way, but they cost me $39 delivered - I guess its different if you can do this stuff yourself, but for me it would be serious overcapitalisation :)