The early Kimbers were neither the mythical "Wilson CQB at a bargain price" many make them out to be nor were they the complete balls of suck and fail they devolved into later.
I don't know how old M2 is but RobS should be old enough to remember that before Kimber there was no such thing as a Springfield Loaded or similar on the market. A few of the Colts could be had with higher profile sights like those seen on the 1991 series guns, Springfield had a similar model called the defender with higher sights and an extended thumb safety. That's it. The early Kimbers were decent guns equal to an SAI Loaded, which, if I recall correctly was created specifically to compete with Kimber. If you wanted a beavertail, extended safety, useable sights etc back then you either had to add them aftermarket or buy a higher grade gun like a Wilson or something from the Colt or Springfield Custom shop.
IME, the Kimber 5" series 70 style guns, such as the Warriors are > the other Kimbers and will need the least tweeking.