I actually just ordered a set of the Antera 309's today for the Speed Yellow '98 Porsche C2S I recently purchased a few weeks ago. I did this after seeing the wheels on a triple black 996 Cab on a recent trip to Chicago. They really look awesome! On the 18x8 fronts I'm getting, the polished lip is about 1 1/2-2 inches wide, and on the 18x10 rears, the lip is about 4 inches wide.
I think they'd look great on your NSX, assuming there are available fitments. I believe they only come in 17", 18" and 20".
If you get a set for your NSX, make sure to post pictures. I could always sell the SSR's on my NSX now and buy the 309's. They are nice.