My engine and trans mounts are rubber. The vibration is more of a "buzziness" at highway speeds, not a tire imbalance issue, those I've felt. This is my first 02, but not my first older car. I've owned an 83 GTI, I still own a 1977 westfalia (not the same animal I understand). I've driven multiple vintage mercedes when I worked at a benz resto shop. I really do appreciate the input from everyone, hopefully this helps in understanding my past experiences. I don't expect a new bimmer, but it's very harsh. I've been looking at getting some very soft (low durometer rating) poly and making my own bushings. I'm a machinist and I'm willing to guinea pig myself!! So far I've found some that is just a slight jump from the hardness of rubber but it should hold up better in the long run. I guess we'll see! Thanks again everyone!!