i live in northern wisconsin and the blackies up here can get quite large. about two weeks ago, a car hit one a little ways south from where i live that weighed 442lbs dressed. now consider that was a spring bear with no fat! i have all kinds of handguns, from 22lr to 454 casull. the truth is that when i am out fishing on foot or just bumming, i carry my 1911 45 kimber. i aint advocating hunting with it, but for defense against a blackie or in your case a lion, any one of those you listed would do the trick. as for which one specifically, whichever is your favorite to carry.