I just had lunch with a good friend whose opinion I respect. Given that tenniscaptain shows a Myrtle Beach homeport, he strongly recommended Bennett Brothers in Wilmington. I have always heard very good things about them, but on other types of work (including a guy with the same model Hatteras as mine getting a major refit). No direct experience myself.
Some of the major yards, such as Jarrett Bay, and Hatteras themselves, have switched to Alexseal, and seem quite happy with it. Guy I know had his Hatteras LRC done by JB and it looks great and he signs its praises. Again, no direct experience myself. In the end, the price of the paint itself is to the right of the decimal point in terms of the overall cost.