Targa, I am not the biggest fan of bluing in general. It really is not a very tough finish, as it is easy to damage or remove, and also I feel it isn't very rust preventative. It must be kept oiled or greased to not start oxidizing. I am a big fan of parkerizing, enamel painted, Tennifer/Melonite.
I'll tell you op, why I bought a Springfield 2 to 3 years ago compared to others at the time. I had a budget set at $900, so I was looking at the following models.
Colt 1991A1 blued
Kimber custom 2 black
Springfield loaded model/range officer/mil spec
Sigs
I went to 2 different gun shops handling all the 1911s they had from most manufacturers.
I had done some research and from what I am aware, only Colt and Springfield use forged slides AND frames, for me, I am picky about my steels. Whether in a knife blade or what my firearm is made out of. I would expect a forged part to be stronger and last longer than a cast part, of equal proportion and design. So I decided I would rather have forged frame. This limited me to Colt and Springfield. The colts I handled (new ones) seemed like they weren't fit as well as the Springfields as a general comparing equally precised items. Also I saw a few examples of very poorly fit and low quality materials used for triggers and mainspring housings. Something you wouldn't even accept on a pellet or airgun.
Anywho I decided I liked the springfields the best, and had to decide on a mil spec, RO, or loaded model. I liked the fancy features of the RO and loaded, and figures they worth $200 more over the price of the mil-spec. I decided I liked fixed style tritium night sights over the adjustable on the RO. I picked the loaded model as I thought it would be slightly better to carry with the sights. The only things I want to swap on it are guide rod for GI plug, ambi safety for standard safety, and swap bushings for w slightly tighter, black one.
Do your research and that will tell you which one you really want. They all have MIM parts but the Colt will have the least, however they will all be well built (or should be). I am old skool and like series 70 which would be Springfield, some colts, and......that's about it of the major makers. I believe sig, ruger, kimber, para, use a firing pin block/drop safety. Series 80 or schwartz