Since you have a 95. I highly recommend you get real aftermarket headers if you are able to spend more than $600. Read on if you like to find out why.
While OEM NA2 headers are great. Aftermarket headers still shown gain on NA2s. Usually the debate are does NA2 see gain from aftermarket headers? The answer is yes. Example here:
DC header on 02+ dyno before/after, pretty decent gain under the curve:
http://www.nsxprime.com/forums/showpost.php?p=470177&postcount=1
Comptech headers on 2000 NSX before/after, 16hp gain. Since this is not a 3rd party test, I am not going to say this is valid, it is indeed too good to be true:
http://www.comptechusa.com/store/media/dyno/2000NSXscPlot3.pdf
Another example 315rwhp na:
http://www.nsxprime.com/forums/showthread.php?t=39059&highlight=headers+dyno
On a NA1 you may see as much as 20rwhp gain from headers alone. There are many threads and dyno before/after results.
If money no objective, you not going to find better choice than GT-One or Fujitsubo. While OEM NA2 header is good, do it if saving every penny is objective. Otherwise you can do better, on top of that NA1 exhaust piping is slightly larger than the NA2 design. Go to Autowave and compare the two in person, don't take my word for it. The gain on Adrain's system is combination of exhaust/header, not just oem header alone.