The series 70 is the most desirable in my opinion, and, you will pay a little more for the colt name. I have 4 colts and I really like them all. Some folks will say that unless you are buying a colt, you are buying generic. I personally dont agree but I do like them and if you want one, you will have to pay the money. I know as a dealer, my suppliers seldom had any in stock, sometimes they had a few defenders or agents but seldom any full sized 1911s.