The end goal is good handling and ride comfort.
Those two together are opposing. FE1 struts are soft vs FE5's are stiff. I didnt know of an FE3. Ride comfort=softer suspension, good handling=stiffer suspension. See where I am going?
I have the Fe5's rear completed. Just waiting on the front parts, but so far, instant respsonse on control, but bumpy on hard roads.
The moog endlinks wont really do much in your case. Instead of it dry rotting, you just put grease in it to keep it lubricated. You should hold on for a few days and I can give you my best response to the FE5 build overhaul I am doing.
2009 Cobalt LS XFE U74
Mods: K&N Typhoon Intake, Option Cat-Back Exhaust, Cosmo Short shifter, Maxxim Ahead 17X7's, MPx shorty antenna, FE5 Strut/shocks, Tein S Techs, Moog endlinks, Moog spring seaters, ZZP shorty header, LSJ downpipe, LNF front grille