I'm throwing my vote in for Springfield. While I only have two 1911s, they are both arguably some of the best examples of Springfield quality. Perhaps I have just been extraordinarily lucky.
The first example, a (supposed to be) Parkerized Mil-Spec, I ordered eight years ago. When it reached the dealer I found a blued rather than parkerized model (boy was I peeved
) that has the tightest barrel lock-up and slide to frame fit you could hope to find even from a gunsmith. After adding a High-ride beavertail, combat style hammer and an extended thumb safety it quickly became, and has remained, my daily carry gun.
The second example I bought last Fall, a Parkerized Loaded model that, while not as tight as the first, is every bit a reliable and accurate 1911. The complaints I see/hear from others about the sharp edges, the two piece guide rod, two piece barrels and who knows what are not and, I'm sure, will not be of any concern as they are things that are as easily fixed as they are easy to complain about.
I still have no idea about whether or not Springfield Customer Service is as good as some say. I haven't had the need.