Follow up: I did not do the TBU. Why, well, I don't tow much other than an aluminum trailer with yard stuff and perhaps a motorcycle, this is a first time project for me and I didn't feel like getting into caliper replacement. So, I bought an EBC kit from Auto Zone. GD rotors and Greenstuff pads. Installed yesterday with most of the work being done by our do everything shop guy at work. I am glad I had the assistance of an experienced mechanic when it came to the best methods for removing caliper bolts etc. without screwing something up. While the tasks are pretty straightforward his experience made the job much easier. So if I remember, I post an update once the brakes have some miles on them.