I got the clear Air Jacket case, I'm not using any docks - just the regular cord that it came with the phone.
With regards to car mounts, I've posted some inquiries already on which is better. I'm torn between the AllCarkit 4 in 1 charger fm transmitter which also serves as a dock AND the Fexii iPhone 3g fm transmitter (not a dock) I'm still researching which is best and worth to buy. So far for my car I only have the Griffin PowerJolt charger.