I am a HUGE NSX fan! I love the super shape and they always catch a pedestrians eye. Exspecailly if accompanied by a raw short tuned exhaust. 3.2L screaming NA behind your head is a great addiction.
The problem with tuning an NSX is engine accessibilty and ultimte power. But you should be pretty happy with stock.
The problem with the body is just deciding how wide to go. with some amazingly wide cars available... almost Super GT width.
For me, the top two above retain the maker lines well.
PS. If you have $100,000 right now, the Revolution NSX is for sale.