As much as I love the 370Z, it's not a "premium automobile" nor does it have a "premium price". It's an entry level sports car at a reasonable price.
It also sounds like you want to buy the Z to impress other people. Let me tell you, ignorant BMW guys will bash the Z regardless if it has the rear fog light or not because "It's just a Nissan". If you care about what other people think, then buy yourself a Porsche.
Buy the Z for yourself and enjoy it for what it is. Don't buy it to impress other people.
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