I'm planning to lower my car further in the next week or two, from -40mm to -60mm. i understand that by doing this, i'm going to increase the strain on the arms and bushes further, so my question is.... Is it worth replacing the bushes with standard jobbies, or with poly bushes and is it worth doing the roll bar bushes too? i'm also planning on dropping a 2.0ltr in spring....if that makes any difference.

thanks people