I'm at the stock height, too, even though I had the opportunity to lower it when I had my Bilsteins installed. The NSX is already plenty low (as anyone who has tried jacking it with a standard floor jack knows). As Patricia aptly notes, it's already difficult to keep the front lip from scraping, and I wouldn't want that to get any worse. And getting in and out of the NSX isn't exactly the easiest even at stock ride height, and I wouldn't want that to get any worse, either.
Tell that silly line about "4x4 stance" to almost anyone looking at an NSX at stock ride height and most people will think you're crazy. But to each his own; the nice thing about lowering is that it's easy for anyone to change his/her car as he/she sees fit. I'm very happy with my NSX the way it is, at the stock ride height.