For a person new to 1911s, I usually recommend a
Springfield Mil-Spec or Springfield GI45. I recommend a five inch Government Model. They are cost effective, durable, reliable, and reasonably well fitted and well made. They will last a lifetime, and are an excellent gun to learn the 1911 platform with.
If a person has a desire to get something "better" then I recommend a Colt NRM Government Model. That's the Colt Series 80 1991, new style with the wood grips and new rollmark. The same durability, reliability and workmanship qualities applies to them. If the Series 80 FPS is a concern to the person, a Series 70 Colt Government Model is the ticket. Colts tend to hold value in the marketplace better, making them a superior long term gun if you ever sell.
sm speaks wisely. The 1911 is a simple weapon that has been made more complex than it needs to be over the years. Some of the modifications make for easier shooting, others for greater accuracy, others for greater durability. Some of the modifications were made for sheer profit in a competitive market. JMB designed the 1911 for reliability. Reliability is foremost in a defensive weapon. Stick with that, and as you learn the platform, modify the weapon to fit your individual needs. You may find you do not need to modify the weapon at all.
No matter what, stick with a five inch Government Model. Overall reliability tends to decrease exponentially as the barrel and slide shorten.