As I used to tell my newbie cops when they came to the range to qualify, "If you have time to cock the gun and aim carefully, you are not in a life or death situation."
We taught, and still teach to fire the gun in double-action ONLY. It's not difficult to master, it just takes practice. Learning not to anticipate the shot is another matter that needs to be addressed, flinching is the result. It might LOOK like you were aimed at the right spot, but you'll never fool the bullet.
And once you acquire some skill with the weapon of choice, you have to maintain it, and a good practice regiment is mandatory. Get some training if at all possible. Remember, it is not what you did once that matters, it is what you can do on demand that counts!
BTW< I also vote for the DA revolver.
Papajohn