I agree with Epiphany,
We have been replacing wire standing rigging and lifelines with spectra and relatives more and more. Its cheap, incredibly strong, easy to throw in an eye splice or a bowline, you can keep a spool on board and replace anything your self on the go. There are coated varieties that are better with the UV or you can use Rob line or similar and have the spectra core and a nice UV and abrasion resistant cover.