With the age of your car and how it felt driving it, I'd be looking really hard at anything under the car made of rubber for replacement. I'm not sure that Koni + GC + Springs + OE mounts saves you any money though. Keep in mind the solid top hats will transmit more NVH, although, for a car that will probably shoot fireballs not sure if that matters.
I have a rule with the german cars, if it has to come out to get to something else, and it may need replacement at some point, it just gets replaced. Not worth the hassles.
I have a rule with the german cars, if it has to come out to get to something else, and it may need replacement at some point, it just gets replaced. Not worth the hassles.