if you want a traditional 1911, from your list, i would go for the colt or kimber. i have a kimber custom and i love it. i really like the STI 5.0, but it has a bit of a different look. i prefer internal extractors, good enough for john, good enough for me. my eyes prefer ajustable sights, not because i change them often, i just prefer the sight picture. i dont like firing pin safeties, just another part to break that you dont need. i have never personally had any need for rails and for me, they take away form the 1911s inherent good looks. most of the mid-range 1911s have firing pin safeties. i left the one in my kimber, but i have removed it from my competition gun. glad to hear you are interrested in purchassing a 1911, whatever you get i am sure you will love it. there used to be a link in a thread on this site that compared many 1911s, i am not sure if it is still around.