So kimbers are highly avaliable where I'm at because I live an hour drive from their home base. I really haven't seen any dan wessons near me at all and only a few springfeilds. I liked the kimber for their accessibility to me but have heard so much on their issues of reliability and build and good things from others. It's hard to tell what is common and what's a freak accident or user error.I would probably choose the Springfield Loaded of those 3 manufacturers/models. The Loaded models are built to military specification and the internals as far as I know the internals are not metal injection molded. So if cared for that gun should last for a long while. For the most part I think the Kimber should as well, but I might opt for a different model like the TLE. I just have misgivings about pairing a stainless receiver and carbon steel slide, dissimilar metals can do weird things over time. And that isn't to say Rock Islands are bad, they do have forged 4140 steel frames and slides, but the last I checked they were still using MIM for their internals so those aren't quite as robust as offerings from the other 2.
It's a good time to get into 1911s I think. I can't think of a manufacturer that's putting out a bad gun that won't last, some just might require a little more care than others.
As far as I know they are all the same other than Dan wesson who's quality is amazing from what I've heard.