Of all things, at least make the transmission mount solid and ensure the rear cross member is new and not worn out.
Loren
@DMSentra sells polyu 90a mounts that he turns by hand on a lathe and makes his own aluminum sleeve as well. It fits perfectly and is very solid. Even more solid than the Prothane offerings. They are quite pricey, however.
g20.net link
You can also change the cross member to a P11 cross member and Prothane does make cheapy inserts you an get for the P11 mounts that are the same front and rear.
I would only upgrade the rear cross member and trans. mount. The pass. side mount transmits the majority of NVH in the car, that is for sure.