I've never bonded with the Silvia (240Z). I'm surprised to see commentary of trading an NSX for one. Must mean I'm old, as the class of an NSX far surpasses the ricey feeling of the Silvia. Perhaps the fact that the NSX is as old as it is now and the prices more affodable for Joe Smangi to get into now. If the NSX was still a 50K+ ride and less of the younger crowd were owning them, perhaps the responses would be different.
Anyway, just my $0.02.