An excellent read for 1911 duty use is
www.10-8performance.com as a well thought out information resource. Go to the tab "Articles" and you'll see numerous articles covering selection, magazines, manufacturing, etc. This is updated regularly and is all real world information.
I own a Kimber Custom TLE II and as was said to me when I took their excellent 1911 user course, THE GLOCK APPRECIATION CLASS. They offer a course other than the Armorers Course, which showed me all the potential problems of the 1911.
Plain and simple, the 1911 has become a hobby gun. If you own one, you need to own a second so you have one available when the other one gets sent off for repairs. Also, units that carry the 1911 have full-time Armorers to maintain them. Do you?
Magazines are all Chip McCormick for me. Some types of Wilson mags have shown to be no good; the version with the slot down the middle flexes and goes out of shape.
I like my 1911, but I carry a SIG 220 for work. That being said, going global would have a Glock on my side, as they are everywhere and parts follow.
Of note with my Kimber, I have an external extractor, though it is a Seriess II pistol. I was told Kimber went back to an internal extractor. During our class, I was able to take the pistol down to every pin and spring. It took five hands to hold all the parts for the unique Kimber extractor assembly to line up all the pins and springs. Not something you want to attempt in the middle of some foreign land or even a living room.
As much as I like the 1911, and the SIG, the HK45C is what will replace the others. SIG has had some QC issues over the years, but I have never had a failure with either 220 or 226 I own. The Kimber 1911 is a tack driver, but I did have a couple of failures to lock back. Replacement of a part fixed that, but it sticks in my mind and has been said here... We do as many 1911 drills to work around the failure as we do to operate it.
Buy an HK and never compromise.
FlagDayNCO