With my 1995 Disco, I use to get terrible vibrations at highway speeds AND if I passed over railroad tracks or a nasty dip or bump on the highway.

At first, i thought it was the steering damper. Swap it out only to find the problem came back soon after. I then checked the shocks and found that they needed to be replaced. After the shocks were changed I never had the terrible vibrations again - and that's been over 7 years and 300,000kms later.

I'd go with OME shocks if I were you.

JohnMc