Both of mine, the 5" and the CMD, shoot my accustomed loads to virtually the same impact point...my loads are a gov't/military equivalent with the age-old 230 gr FMJ, and a target load consisting of a 200 gr LSWC at just under 800 fps. Impact points at 25 yds are an inch apart, and best of all, that inch is vertical!
Come to think of it, the above statement is true of the rest of my .45's as well...very little impact point variation: Remington Rand WWll 1911-A1, Colt Combat Commander, Colt Series 70 Gold Cup, and my two son's Colt Series 70's.
For that reason, I'd get a set of tritium night sights as an up-grade, but don't feel the need for adjustable's. I'm a believer in adjustable sights on my revolvers, with few exceptions, but the .45 ACP autos don't seem to need them in my hands.
Best regards, Rod