If I wanted a 1911 I wouldn't buy anything until the plethora of anniversary 1911's come out next year might be some interesting options and the plain ones if you don't like them will certainly drop.
I read a good ballistic history report about 10 years ago with a lot of supporting evidence. There was no 45 caliber ammunition that was produced before 1980 that would out perform a modern 9mm produced today. I'm sure modern 45's, 40's, with modern ammo may have more stopping power then...