here ya go, completed this miniseries, and added it to the first post. please comment if you see any errors
ASMS, the system that became the present AEGIS was first conceived in 1963, when it became clear that Typhon would not lead to results. Development started slow, but in 1969 it became Aegis. The cost concentrated in the advanced fire control computers and radars, as in Typhon, but even more so in the Aegis system because it used the standard missile instead of a new developed missile.
In 1969 the only missile ship under development was DXGN, as DXG was dropped. Because of that, ASMS was designed to be fitted on a nuclear destroyer or cruiser of 10000 tons displacement. When Admiral Zumwalt became CNO, he was determined to increase the amount of combatant ships by designing low-cost ships, which was enforced by unit-cost and unit-displacement limits. DXGN of course did not fit in this plan: nuclear vessels were just too expensive to build in the numbers required.
Zumwalt wanted a low-cost Aegis vessel, and the limits were set as $ 100 million and 5000 tons. Of the 139 computer runs of the first series, only one design was within these limits
This vessel had just an Mk 22 launcher, a helideck and Aegis on board. This was considered too austere even for Zumwalt, so new limits were set.
These limits were set at $ 125 million and 6000 tons, which proved to be more realistic. Within these limits, the design considered varied considerably. At first it was to have an austere sonar suite and provision for landing a helicopter, but no hangar. The SPS-49 search radar was deleted. The launcher would have been the Mk 26 Mod 1, which allowed the ship to fire ASROC and Harpoon as well, next to the SM-2MR
Critics argued that so valuable a ship should have at least 2 launchers. This resulted in a design with 2 Mk 13 launchers, which could not fire ASROC. LAMPS and SPS-49 were added, and this resulted in a vessel of 6161 tons and $ 136,1 million, both of which exceeded Zumwalts limits. This, and the lack of growth space in the Mk 13 launcher, made that this design was not satisfactory either, and a return to the Mk 26 was made, this time the Mod 2 with room for 64 missiles.
In the end, this resulted in the vessel shown underneath, the FY74 model, the only one about which exact dimensions are known.
Displacement: 5884,3 tons
Length WL: 148,74
Top speed: 29,4 knots
The cost of this variant rose though, and was not at $ 200 million. This would only get worse over time, but it was clear this was the minimal platform that could support the fleet with effective Aegis air defence.
However, within the navy there were still plans for nuclear ships, and it was considered if it would not be better to have only one class of first line combatants. This, in effect, was a return to the original ASMS/DXGN plan. The nuclear ships were too expensive to build in numbers though, so it was proposed to have 8 nuclear strike cruisers and 16 conventional powered DDG-47 class ships, based on the Spruance hull. In retrospect, this was a fortunate turn of events, as we can see on the resulting Ticonderoga class; it would not have been easy to put a combat system designed for 10000 tons on a 6000 ton hull.