I have used the Tru Fire Hurricane model releases for years and really liked them.

I just bought a Tru Ball Chappy Boss because my groups shrank dramatically using one. I feel I get a smoother release with it but that is just me. I'm trying to decide if the click is too noisey for hunting though.

Whatever release you get, make sure it is for string loops. Most are today. The jaws should be closed at rest.