I'd find a 649-3. Humpbacks are just as snag-free as your 442, are great fun to shoot single action at longer distances at the range, and the slightly longer ejection rod on the magnum model knocks 38 Special cases out a bit more reliably. The 649-3 has no lock, so that's not an issue. You already have an airweight for those times when you have to put the gun in a pocket instead of a holster, but a steel gun will carry just about as easily on a belt, and will be a lot more fun to practice with than the lightweight. (At least it would be for me.)