Quote Originally Posted by StraightSix
For a street car, leave all the bushings rubber. That way there will be enough give in the suspension to not rattle kidneys. One of CSCC's autocross cars has nearly all poly bushings and there's really very little deflection in the suspension at all, and I would not want to DD that.

Also, what has been said about cheap coilovers is very true. Many times the dampers aren't well matched to the spring rates and you get a pogo stick ride.
Vouch. I'll give you a ride in mine for proof... Even with the AGX's set to 1...it's still pretty rough...