Lee, I bought the NCX as it was a good price but was not happy with the build in terms of durability. I did not use them and traded up to Ezzy Freerides and am glad I did.

It cost me a fair bit more but worth it in my opinion.
If you get the NCX it is fairly thin mono and I would spend the extra and get the Pro as it has Xply. Unless you are extra careful in your handling of your sails, which I am not.
Only my opinion and go and look before you buy.
Cheers
Jeffro