This is one of three cars I drive so I do go for the cheapest parts. The reality is that I drive this car 5000 miles a year and that flex disc will last for the remaining life of the car. I finished the repair and still have a slight vibration from 65-75mph so I am going to replace the tranny mount next and cross my fingers. I did the motor mounts last year so if its not that its probably that u-joint between the axles - I definitely wont mess with that unless it gets worse.
Thanks for the help.