First of all a 97 Honda Prelude is going to be way more reliable than a 90 300ZX. The other reason is because if you were to ever sell your Z you would get pretty much crap for it... like $7-9K. The Prelude is valued much higher than that I believe. And you'll be moving from an older car that probally has a few imperfections to one that has still has that new car feeling. Just my 2 cents.