I have a 350z and S2000, the S2000 is lights and more agile but the zed is more of a bruiser, easier to get the performance from as you don't need to rev the ass off it to go anywhere but in stock form the S2000 is a great fun car!
The S2k is a bit small f your bigger then 6 foot tall like me,
Drive them all and see what you like best?