Although I don't really play soft tip anymore, I still like all my old soft tip darts, and it is hard to find good steel tip darts in the lighter weights. Thus conversion points is a very good option. O-rings will keep them tight, and you can even put hammerhead style tips on most soft tip darts. Although with hammerhead tips you will need to pick up some "blue" Lok-Tite at the hardware store.
As always, click the image for a larger picture.