listen man...chew on this rice.
An FX500 turbo system will cost you ~$18k for ~400rwhp.
Correct me i'm wrong guys, but the cost includes labor, tuning and all the parts.
IMO, thats pretty damn steep.
The comptech supercharger adds a paltry ~35hp for a $9k package.
BTW, while the nsx was pretty light ~3100lbs 15 years ago, 3100lbs and 270hp are mazda rx8 kinda numbers. use the search function, this discussion has been made several times over.
If you want a unique, great handling (albeit slow by todays standards) car with the interior of a 1989 accord - buy an nsx. While they are very reliable, expect to pay $$$$ for anything that may go wrong.
Its a tuff decision, one that i wrestled with for many months. It sounds like you havent even driven an nsx.
personally, if it were my $30k, i'd get a used vette if i wanted outright speed, a new mustang (i cant believe i said that), or a 350z (again). An ATI s/c for the Z will cost you ~$7k for 410rwhp.