There are a few good threads (one extremely long...here:
https://pistol-forum.com/showthread....r-1911-Running) that are full of good info.
Your question is very open ended and leads to subjective responses. What is the gun going to be used for?
After a couple decades of dealing with police armorer issues with 1911's of various qualities I've formed some pretty strong opinions.
If you want a 1911 to take to the range now and then and play with then a Kimber, Springfield, or one of the myriad of other quality manufacturers is fine. This is your $600 to $900 guns.
Normal patrol duty use where the guy shoots it five or six times a year and carries it everyday? Springfield TRP or LB Operator guns are fine, so is the Dan Wesson range, especially with a little massaging. The $1200 to $1500 are fine here.
For SWAT guys or firearms staff that shoot at least every couple weeks, blow through at least 500 rounds a month, and carry the gun on duty...you either need at least a Wilson quality gun or a gun that has been completely overhauled with quality parts and fit by someone that knows what they're doing. It's pay-to-play so you are in the $3k plus range.
It's easy to make a 45 ACP gun run because that's what everyone knows how to do and what the modern 1911 was meant to run with.
9mm can be finicky, but can be made to work.
I see less and less cops wanting to carry the 1911 these days. 1911's were the shiz about 10 years ago. Plastic guns rule the day now.