My E36 M3 strut mounts passed TÜV last year where they check very carefully for rubbing. I also have the Z4M FCABs though which I think moves the Eibach springs a bit.

I remember one or two people who messaged me on E46Fanatics about the KYB mounts and if I remember correctly they were fine. Given the price difference I'd probably go KYB as well and just be ready to mess around with it if necessary to fix any potential rubbing issues.