If you're looking for a type, probably a shooting head with a running line.

If you're looking for a brand of "regular line", there is no "best". Everyone has their favorite. It depends on the rod, the person casting it, fishing conditions, weather conditions, and more. The best possible thing to do is to cast as many lines as you can get your hands on with that rod. Sometimes what seems like a so-so rod will come alive with the right line.

Jeff