FYI .. Audi has just revealed some sketches of their Quattro concept prior to the Frankfurt show. I'm not sure if this is the right forum to discuss it on but I mention it because I expect people will consider it potential competition for the NSX and it has a number of features that are similar .. hybrid AWD drive .. 7sp DCT tranny .. twin turbo motor .. limited prod'n .. halo supercar .. etc. About the only area where it differs significantly is that it's not mid engined and has 4 seats. But it's got some agressive looks and 800 combined hp.
http://www.autoweek.com/article/20130814/CARNEWS/130819926
http://www.autoweek.com/article/20130814/CARNEWS/130819926