People have differing opinions on what a "nice" NSX is. I know it isn't going to wow anybody at an NSX gathering, but to me getting to actually drive it is the nicest thing about it.
One of the things I like best about used cars is the gradual experience of improving it over time. A fender here, upholstery there, maybe someday a full repaint. Seeing the results of each step brings enormous satisfaction. Could save awhile, pay more for something that's already "ready", but where is the fun in that? And the whole time in between, not driving the NSX?
Another plus is the car's damn interesting history, if you're into that sort of thing.
And if you plan on being on the inside most of the time...