Skip,
I'd add one more class without splitting hairs. Later year non targa models are quite rare.
Agree with Skip and VERY MUCH agree with the above.
The Zanardi and, even worse, NA2 coupes are in an entirely different category value wise based on pure rarity.
As for the 95 being "worse" than the 91, I think this is very subjective.
Some folks will say that they must have the absolute lightest NSX with the absolute minimum of "technical aids". For these folks, the 1991-1994s are THE cars to get.
Other folks, however, want the open air option, power steering, etc but cannot afford an NA2 (by the time 1997 rolled around, production had dropped off so much that there will always be a big NA1/NA2 price gap IMO). For these folks, the 95-97 make a lot of sense.
Another thing to consider is that COLOR can be a big driving factor with the NSX. Most of the colors were limited availability and the extremely limited production means sometimes you have no choice if color is critical.
For example, I love blue sports cars. I had the 03, but I really could never get into LBBP. I think MCB, on the other hand, is the nicest blue I've ever seen in a sports car that wasnt a Porsche
So for me, 97-99 was it. Hence the car in my sig