Personally I have put about 700 miles on a S-2000.
Great car. Great for the money. Love the dash and cockpit style feeling. Had the feeling though, if it was to drive everyday it would start to feel cramped and quite "smallish".
On the outside, really quite smart in its looks. In all, really a handsome little roadster, Largest complaint: Boot seemed a bit cumbersome and cheesy (not on the car however) and not really easy to put on. I suspect that would get better with time. Also, the top was surprisingly hard to re-attach
The engine - wow! This is a motor that sings. It makes you want to spend some time at the track. This motor really tells you to put it between 5000 and 8000 rpm. And it gives you the feeling that it is happy to be there "all day long". To that end, it is almost a disappointment on the street. With the exception of small streaches of road, this car can rarely be used in that capacity.
The downside personally is,I feel over time, there will be quite alot of them. While you won't see them "coming and going", they will be seen quite frequently. Maybe that is already happening. So exclusivity is unlikely
The S-2000 seems quite at home in NSX circles. Since you already have one, I suspect you are already sensing that you have family in the NSX circles. I think some NSX'ers seem to look at it as a bit of a first-cousin.