The problem is most likely motor mounts, but may not be confined to just the top torque mount. If the lower engine mounts and/or the front subframe to body mounts wear they can all cause varying degrees of vibration being transmitted through the car. Some people have replaced them all at the same time, and reported that the car felt like new again. My upper torque mount is fairly new and I currently have alot of vibration at idle. Last time I had the car on a lift my buddy said the lower engine mounts looked like they were shot, so they're on my list for replacement soon.