I have Sta-Loks, but should I need to re-rig, I am hearing good things about the Hayn Hi-mods as well.
As for the rod rigging, 27 years, especially in salt, is old. Rod-rigged race boats here on Lake Ontario have seen failures at the 12-15 year mark, and realistically our season is only six months long. I think that if you are going to do this, do it right. You should consider replacing your halyards at the same time and that might mean replacing your sheaves. The good news is that the mast is usually OK, but old spreaders, tangs and similar fittings need a close look.