My favorite is the cheapest I have bought, but also the nicest.
It is a stainless Colt "Tactical Commander". All I know about it that makes it special to be called the "Tactical" model is that it went through the Colt custom shop and came out in the early 1990's. The gun is way cool. The trigger is the best 1911 trigger I have ever felt. It is extremely accurate. And, after doing some home smithing, it is very reliable. Even though I have heard bad stories about Colt in the 1990's, I am impressed with what Colt did with this one.
It was not working well when I got it, mainly due to lack of care. I got for a bit under $500 because the owner thought it sucked. I took it home, cleaned it good, polished it up and now it works like a champ. It is the nicest, smoothest, most accurate 1911 I have held yet.