Nice to read your post
I understand what you are saying about the Z and the way it feels. My last car weighed less than 1200kgs and the Z didn't feel heavier. At the end of the day, if the chassis is sorted well, then who gives a munkys about the 'paper' weight? True, the car can't be called lightweight due to the specification alone, but if it handles like a sportscar and drives like a GT, you have the best of both worlds.
Personally speaking, as an overall package, I rate Japanese cars over German cars.
Okay so perhaps the interior of most Japanese cars aren't exactely as good as some German cars, but then again if BMW built the 350Z, you'd be paying a heck of a lot more money.
I would rather have a reliable Japanese muscle car with a questionable interior over a less reliable, common german car with a prohibative price tag and exorbitant servicing costs.
Plus I'd stand a better chance of getting out of a T-junction in a Japanese car