Depends on how much horsepower your running. Most aftermarket poly mounts come in different stiffnesses in reference to horsepower. I have the AVID Racing mounts with the softest material and they are certainly stiff with some vibration. Not too bad though. My suggestion would be to use a poly rear mount, and OEM everywhere else to absorb vibration.
or go all OEM and use an engine torque dampener.
or go all OEM with the Energy Suspension inserts for the lower mounts.