i want to replace my rear shocks on my 99 continental. auto zone sells both passive and active shocks, i have already changed my front struts to passive, and my airbags to springs, should i go with the passive rear shocks, or active which are almost twice the price?

since you have already taken half the ride control system away (the front), I would do same in back. Just to make things more consistant for anything that may come up in the future (maintainance wise)