Just dont go anywhere you need a concealed weapon and your problem is solved.
While this issue of best weapon etc, has been argued a million times, the one good point is this, the only good handgun is the one you can shoot accurately in a hurry. The real killing power of a weapon is all about bullet placement.
Revolvers can jam, and they do. They are slower to reload. Virtually non-existant in any military force today, and they are people who make a living with firearms. Colt has stopped making them altogether, other manufacturers will follow.
Do those sound like selling points? Not really.
Autos have gained in acceptance and are practially the only weapon used by both military and police depts today. They dont make a choice of weapons lightly. The overwhelming majority of competitive pistol shooters also use semi-auto pistols exclusively.
They hold more ammo, reload quicker, and the semi-auto action help absorb recoil. The average shooter can fire them faster if needed.
Do those sound more like selling points? Yep.
Large bore calibers are good for stopping power, cross sectional density is as important as velocity. The major pistol makers all make good weapons. Basically, make your choice on what appeals to you, and you might use as a reference those comments from shooters who really like thier weapons.
More important than anything else is whenever you make your choice and buy your pistol, practice until you are comfortable and confident in it.
good luck,
dago