I had luck with KYB . I got Rancho with the calvert drag suspension they worked good . The best were QA1 aluminum body adjustable but Expensive.
I just bought QA1 coil overs now again from S&W race cars. The reason was we don't know the actual weight yet and they will exchange the coils there. We bought everything from S&W because we can drive there.
I believe the best bang for the buck would be KYB.