Check out the Yokohama S.Drive. They're fairly inexpensive, have good performance, and last quite a while. I have them on my car now but just ordered some Star Specs to replace them. If you don't have 400hp the s.drives should provide plenty of traction.
+1 semi agree, Lets put it this way, if you're NOT going to drive your nsx that much, don't bother putting on anything too expensive. The S Drive will do the job. However, at a drivers point of view, sorry to be a little offensive, but the S Drive is crap. Sure it'll get you around town, sure it'll last longer compared to any of the other extreme performance recommendations above, but the NSX was never designed to run on mediocre tires.
As an NSX owner, even if i can only put 500miles onto it per year, i still want the best driving experience out of it and tires definately plays a HUGE part. If it's only a hundred or two dollars difference, i definately will not cheap out. We understand you don't need some extreme r-compounds, but do consider the ones listed above =) they are all very awesome.
here's a couple ones I will recommend for you wheels. in no order preferences:
Bridgestone RE-11, Yokohama AD08, Dunlop Direzza Z1 star spec, Falken RT615k, Toyo R1R, continental DWS.
Try searching the forum also, there has been tons of discussion concerning tire choices for oem wheels. Happy shopping and good luck!