Lots of useful advice given, and I would add one more caution. Do
not select your line based on whether you might or might not every enter a "race".... This decision needs to be about sailing the boat. Try to keep that "R" word out of your boat equipment vocabulary.
We changed from the OEM wire-to-rope lines about 20 years ago. Very low stretch T-900. Still works great. 5/16" and they hold in our clutches, both the OEM brand, and recently some new Lewmar's .
Also would add my vote to avoid 'cheap' line
and avoid 'sta-set X'.
As for termination of the halyard, opinions vary. While the braided-in loop for a shackle looks way cool, the fat part of the buried core can jam in a sheave at the top of the mast. I use (that's actually the name) a
halyard knot, and seize the little short protruding line end. That way I can easily bring down the halyards every couple of seasons, replacing each with a tag line. Launder them, and reverse them.
But, as some sage once observed here, "your boat your rules".....
