I went for a much more aggressive look, I'm not a fan of the 91 OEM rear apron, its my least favorite OEM part on the NSX right after the OEM 15/16's and OEM headers. Everything else I love about an original NSX.
I think the 02 OEM is the best style for the natural body lines of the car. I may get one just to able to swap it out once in a while since its a very quick change.
But if you want to be a little more unique, there are other options. I used the WW without the parachute 91 rear lower valence, and painted flat black the lower mounting brackets that are actually part of the upper bumper, so the upper bumper was not modified in any way.
The original cut outs for the rear bumper were no longer there which also allowed me to raise the exhaust another 2" to get the tips closer to the upper bumper, thus fitting better with the rear. If you look at the rear bumper the tips end at the same point as the upper bumper but because they come out much lower at the tapered section of the diffuser It makes them look as though they are protruding much further. (it is very noticeable from the side)
I plan on making an aluminum diffuser that will be riveted to the WW spats but have not had time lately, also have been waiting to acquire more knowledge on making it functional. The diffuser I will build may either keep the exhaust fully exposed similar to the JGTC diffuser or curve up and cover the center of the exhaust and finish right under the license plate frame.
Either way you go, do it for yourself and not for the community...