If it's good enough/better than what you have then meld what you like, but don't blow your gil on something that will be replaced. Secondary stats are a minor boost to your performance.

For my alts I made ruby accessories (ivl110 STR) and put on a VIT IV an a VIT III. It was a huge boost to the barely 50 warriors, and they are better than any 130 alternative for low difficulty end game content.

Just make sure you fully spiritbond the stuff before you replace it, and if you don't need the gil save them til the expansion. They are adding TV materia, and there's a chance that ilvl110 might have a chance to become TV materia.