As a 350z owner, I'm going to have to chime in for my car which also got Top Gear's car of the year award =D
Stock vs stock, none of the other Z's come close. Whether its due to dated rims or knock offs that followed after (specifically when Saturns stole/borrowed/whatever the 300zx headlights), the older Z's looked absolutely horrible stock - especially stateside with their stupid bumper regulations.
People don't give enough credit to Nissan - despite all the loom and doom about finances; Nissan hasn't pulled away from its motorsport pedigree. The other big name Japanese car makers have withdrawn from making more performance RWD machines.
? DATA VH45 Kai JE piston 700 horsepower F-CON V Pro TD06-17C ? 2
RISING BILSTEIN RISING surge tank SARD 800cc I / J ? 8 RISING EX system BILSTEIN
SPL damper NEOBA VOLK GFC BLISTER fender One-off dashboard