This thread irritates me...
In short, your 370Z is a total waste in your possession.
If you're considering getting rid of your 370 just because there's faster, more powerful cars out there, then you haven't grasped the concept of this car and you don't deserve it.
I don't care what kind of car you buy, there's ALWAYS going to be something more powerful, quicker, faster than yours. Go ahead and buy a nasty American muscle car, then start crying and complaining the first time some big turbo diesel pickup or some ratty, beaten up modded Honda Civic blows your doors off.