I think you are just looking for an excuss to buy a semi-auto pistol/firearm? If that is what you want go buy one.
I carry a 40-S&W Springfield Armory XD-Tactical for personal protection from people.
I carry a Ruger 44-mag or Counter Assault Bear Spray for bears & cougars. I have seen the results of the bear spray in use on a video. I never though much of bear spray until I watched the video, boy does that stuff work. The person sprayed a bear in the face, the bear spun around & ran away bawling like a baby the whole time. I carry the bear spray with me 90% of the time when I bow hunt & leave the 44 back at camp.
If I were going to pick a pistol for personal protection from black bears? I would buy a 44-mag. Smaller caliber just don't have the power needed. Anything larger than the 44 is just to big for me to handle.
What ever pistol you decide on, buy ammunition that is loaded with hard cast bullets. Hard cast bullets will give you maximum penatration. Even Federal Premium self defense loads are not made for shooting bears. COR BON, Garrett or Black Hills Ammo will have a load that is just right for you.