I wanted to add the following watchmaker to the list:
http://www.matheusfinewatches.com/
They are located in Highlands Ranch, CO. This is a suburb of Denver, CO.
They have a Rolex parts account, and do a great job with a full service. I had a chance to meet Tim (a watchmaker there) and see their operations. They have done my families Sub and vintage Air King a few times.
They offer a two year warranty, and are priced just below the RSC's.
Matheu's Fine Watches is good to go!