Everything is more critical now that you have firmed up the front end. First of all, those Bilsteins are new? More importantly, get yourself to a good tire shop with the Hunter series wheel balancer and get a precision balance- about $30.00. This will take some very slight shimmy and vibration out- do all 4 wheels. They will tell you if your tires are slightly cupped or what not. The Hunter balancer (third generation) is a godsend and really helps eliminate those little nagging steering wheel jitteries. I found that my new gas Boges were too jippety and jittery at highway speeds 75-85. Kyb Gas-Ad-Just calmed everything down. The final puzzle piece in my case (89 740T) was IPD antisway bars. They just tied everything together with a cohesive functional feel. Good luck