For E30 :
KONI + Eibach
Front:
Tempremental - great when the weather is nice and cool eg nite, rain. Floaty when the weather is hot ie mid-day.
Rear:
Not too bad - but a tad soft.
Setting requires driver's sensitivity
Drop height (318 M40) slightly (half a finger - front) lower than BILSTEIN Sport.
No bump stop as compared to BILSTEIN
My verdict:
BILSTEIN is still the best. But u have to use KONI, use it only for the front.
Get a BILSTEIN (heavy duty - Black) for the rear.
Again, it varies from one driver to another.