Hey Keith, a lot of the locals here go to C&M Honda in Stafford. Ask for Carl
(281) 498-6364, he's been servicing NSXs forever. I have used him for my PPI, timing belt, water pump, valve covers, belts, coolant flush, fuel filter and clean and re grease axle boots so far and have been happy with the service.
Which car are you looking at? We might know something about it.