michaeljquinn,
If you want my opinion, i have had both Koni's and Bilstiens and the Bilstiens were a better shock. They lasted longer, gave a better ride, and didn't have any problems. The Koni's i had one gave up the ghost about 3 months after install, they blew a seal and were no good. Although this only happened to one of the four i thought it was dissapointing. The replacement was not real quick in coming either.
Cheers
Gary