I ordered the M3 motor mounts and they should be going in next week or so. I don't remember any vibration from my M3 test drives so I think they'll be pretty smooth.
but fondly remembered...
Technique Tuning Stage 1 Turbo w/ Greddy Profec B Spec II | 3.07 Quaife
ATI Super Damper | Vaio Oil Pump | VAC Pan Baffle | SRE Organic Clutch
Turner Reinforcements | SPC Camber Arms | Powerflex FCABs & SFBs
Turbo Driveability Video
Horsepower vs. Torque