Rt-ponder, if you want a better response, you need to state what the manual says is needed. If you can afford an NSX, you can afford the shop and owner's manuals.
Fluid recommendations are based on substitutes or equivalents to the OEM's recommendations.
If it requires a 30-40wt motor oil(thank you CCS), then just about any of the MTLs and MTF's, or ratios of them mixed, can be used. Redline MTL MT90 75w90NS, Amsoil MTF MTG, and BG Synchroshift-II are some to start with. And, theres always the hondacura precision crafted stuff.
There are also plenty of synthetic HDEO and motorcycle oils to choose from. I wouldn't bother with PCMOs.