Hi, I looked up your profile, are you a WW2 Vet, or Korea? Thanks for your service on any level.
There are Colt 1911 variations that are designed to shoot better than the Government Model. That said, there is only one model I consider in a 1911, and that is the Govt model. The original.
To answer your value question, I would say 1600-1800 dollars.
If you list it for sale, I hope you offer it on the " Guns for sale " forum on this site.