ummm...how are your motor mounts?? I, with my solid front and ES rear insert, experience alot of vibration...Also, a groove in the road will throw your car off anyway. Perhapse you are being a tad too paranoid about it?? I know it happens to me, or anyone with alot of cash into their ride.

Its really hard to diagnose suspenion/vibration issues via the web...you kinda have to be there to fell what the issue(s) is(are)