Most of the release companies all make good quality BT releases.

You can have a 4, 3, or 2 finger release. Some handles have more of a swept back geometry to them and some are more straight.

You need to find one you like, and that's the hard part- being able to try some of them before buying. If you're able to go to some of the bigger target tournaments (Vegas, Lousville) the manufacturers have booths there with everything for you to try.

Carter, Zenith, Scott, Truball etc all make good BT releases. Deciding on one that's right for YOU is a personal decision because what feels good to one person won't necessarily feel perfect for another. I know Zenith makes a nice starter pack with video to get you going and trained on how to properly use a BT release.

LOTS of used ones around on Archery Talk and Ebay.