The 1911 is arguably the finest pistol ever, however it takes dedication to master it. The other pistols you mentioned, of the "Glock" type action are much easier to master. You state that the weapon would be a "just in case" weapon. If you are not planning on spending a substantial amount of time and effort on training I would suggest you stay away from the 1911 platform. Regardless of your choice, this is a life insurance policy. Become familiar with it to the point that using it is a reflex. Also, both the .40 and the .45 are proven man stoppers. Any caliber will kill, stopping is another issue. For me it's a 1911 in .45acp. I've carried one, of one make or another for about 30 years. My current favorite is a Kimber Eclipse Ultra II. Had problems with it out of the box. Sent it to Kimber, they sent it to their "Custom Shop", did two and a half pages worth the work to it and had it back to me in two weeks. The weapon has been flawless since! No malfunctions period! Dirty, clean, mixed ammo, limp wristed the gun has had close to 1000 rounds through it without one malfunction since they re-worked it. I would be lying if I said I was happy from the get go. You spend that kind of money for a weapon just to have it malfunction dang near every time you pull the trigger kinda ticks you off. I sent a letter with the gun stating repair it, exchange it or refund my money. The service I received was as good as any I have experienced.
Hell, buy both!
Good luck!
Norkal
INVEST IN LEAD FOR THE TIMES AHEAD!