From my experience, HSMITH, dfariswheel, dsk, Tuner, and OldFuff.... all nailed it down!
I should add, however, that I think the 1911 is the type of gun that an owner really needs to get intimate with... to understand the care, needs, feeding, and tweaking of. Oftentimes when a 1911 doesn't run well, the solution is a really simple fix. I'm sure many 1911 buyers have sold otherwise reliable guns which were only in need of an extractor tweak, magazine brand/follower/spring change, or recoil spring change to make run reliably. But if you have little knowledge of 1911's, this is the detail stuff which can kill it for you. If you want to own and thrive using 1911's, you really need to get knowledgeable about the guns.
Not that buying a Glock or Beretta will guarantee trouble free use either! Problems can and are encountered daily with every brand and type of firearm you can name.
I've bought perhaps 25 or more new 1911's in the last four years or so... the vast majority of them Colts, with several Kimbers, a few Springfields, and an Ed Brown. I've had extensive custom work (because I could, not because it was needed) done on three of my Colts.
Had just a few minor cosmetic issues with two or three of the over twenty Colts (which were fully corrected by Colt at no cost to me). Functionally, the Colts have been outstanding... exceptionally reliable with a variety of magazine brands and ammo brand/types. They are my top pick among production 1911s. These guns can be counted on to run reliably right out of the box. NO break-in period (which is as it should be as far as I'm concerned.)
The Springfields have been pretty good... had one "Loaded Stainless" which was a nightmare, but it was my first 1911 and had I been more experienced, I probably could have straightened it out.
Have several early (pre-Series II) Kimbers... which have performed well with one exception. That one went back to Kimber twice with no satisfaction. Finally after being worked over by a custom 'smith and subsequently by myself (now that I finally have the knowledge and experience to really figure this stuff out reasonably well) it's a good running gun. Wouldn't have or rely on a new Kimber if you GAVE it to me, though.
Couldn't agree more that from what I see, most gun buyers shoot a very little bit and then barely, if ever, use the guns. You can buy 10 year, 20 year, 30 year and older guns that have never been used... still NIB! Great finds, but not that uncommon either! I have bought a bunch of older S&W revos in the last couple of years that were like brand new when I found them.
ALL current gunmakers turn out their share of duds these days. Modern manufacturing has some real high points and also a huge amount of low points. Many of today's products are NOT built to take a lickin' and keep on tickin'.
I believe the sweet spot in today's 1911 market is truly with Colt. They are still making 1911's with excellent grade components (for the most part), fine metallurgy, and superb reliability. Some of their guns (as with guns from EVERY maker) have slipped out which need to slip back in for re-work (mostly cosmetic with the Colts, not so much with functional issues), but it seems that most recently, Colt is pulling things together well.
I think Springfield is making a decent product and stands behind it, but their component quality is not great and aesthetically, I think they pale in comparison to Colt.
Kimber is a lost 1911 brand, as far as I'm concerned. Between all the MIM parts breakages, Series II/Schwartz system malfs, external extractor failures, and customer (dis)service dis-satisfaction complaints, I wouldn't even consider buying a new Kimber. Kimber appears to have completely sold out to mass marketing, advertising glitz, pedaling little more than doo-dads, fru-fru, and bling. Quality, reliability, and customer satisfaction seem to be mostly gone at Kimber, even though some buyers of their current production guns seem happy (so far) with their guns. I consider them fortunate consumers.
S&W seems to be satisfying a great many buyers of their 1911's, but I have no interest in a 1911 with the Schwartz system, and with the Colts available, I have no motivation to buy any other production-grade 1911 besides Colt.
Another poster made what I feel is a particularly valuable point... try to resist the urge to extensively modify a new 1911 simply because "you can". Many a 1911 buyer has taken a perfectly reliable 1911 and screwed it up through modifications that weren't needed. Beware not to subscribe to the maxim some governmental agencies seem to subscribe to: "If it ain't broke, fix it till it is!"
Semi-Customs and Custom 1911's are cool, but don't offer any more reliability than a box-stock Colt offers and you pay a heck of a lot more money for the bragging rights. I have some of them and I do enjoy having and shooting them, but they are no substitute, when it comes down to defense-use, for my basic Colts. Defense-use is my primary purpose when it comes to 1911's.
As was said earlier, in a defensive shooting situation, you will be lucky to even hit your target in a meaningful way, much less be concerned about 1" precision at 50 yards... that's absurd. For me, it's TOTALLY about reliability. Nearly every decent quality 1911 today has all the accuracy anyone would need for defense use.
For the money/quality/reliability/performance equation, I think the sweet spot in 1911's is Colt's 1991A1 for a mil-spec styled gun:
and Colt's XSE for a contemporary-styled 1911: