I can't comment about any of the dealers listed but I did just go through my 92 35K mile car with timing belt, and a bunch of other general maint. items. It all came to about $3K. Suburban Acura in the Detroit area did the work.
You might try Brookfield Acura. They have been listed here on many posts due to their vast knowledge of the NSX. I have also decided to have the upper case of the transmission replaced due to snap ring concerns and while they are doing that I am going to have the clutch done as well. I have already talked with John at Brookfield. I was also provided a 20% parts discount.