Being a Honda dedicated guy I'm feeling obligated to say the S2000. But I must admit that the new 350Z would be more fun and exciting simply for the fact it is "untouched" basically as of yet. But yet IMO they are two different kinds of cars... ones a convertible the other a coupe.
But no matter which one you choose it will be your own, hence unique, and very dear to you. So does it matter what we think... little.:thumbup: