FWIW:
I have Koni single adjustables on my '76. '62 and '90 BMW (waiting to install). I have run Bilstein / Boge / Sachs in all of the cars and for the price, I like the adjustability of the Konis.
Koni NA (and many other vendors) will rebuild / revalve to your specs should you need to go there.
Jase
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