I know how you feel because i drive a stage stock NA Z 2+2 and in the area i live there are always some punk (no offense to anyone) with an Evo or Sti who wants to race you. I never bother because i know both the Evo and STi can beat my ass but whats the point of doing that anyway? there is nothing you have to prove. I drive my dream car and im happy about that. That punk in his little tin can is gonna go tell all his friends "dude i beat a ZX the other day" and thats it, but in the end your the one who is enjoying yourself more becuase your driving a car that is known by millions. The Z is favored by many many people (i mean my grandma even knows about the Z) and it has the looks that no other car has. I know i babble on alot and on these forums i don't know much technical stuff but i atleast can tell you that don't lower the Z by comparing it to tin cans and keep your car because it is worth it. There is no other car like the Z32.
PS if you treat your car right and take good care of it youll save alot more $$$ than you think.