ok im new so dont kill me....

280z/300zx

Personally I'd be pushing for just getting a different 370z. Reasons why:

1) you have been out your brand new car now almost since day one and now it looks like it may be a few more weeks. Plus there is no guarantee that when they get a new ECU in that the problem will be fixed. It's happened more than once where the initial fix doesn't solve the problem.

2) Chances are what they are going to offer are free services or extended warranty. For the first few years of the cars life the only thing you will really need are basic services that you can do yourself at home. I would rather do my own oil changes rather than Nissan do them. So giving me free oil changes and tune ups would do me no good. Extending the warranty? Again, in theory the car shouldn't have any problems with it for several years. Warranty work in the first few years of a new cars life is far and few between. So again, to me this would be pointless. As other mentioned they are not going to be giving you performance parts or anything like that.

3) I would already be sour about the whole experience and would rather just start over with a new car that doesn't already have issues. That's just me

On a side note, I'm not sure you would want the NISMO wing on the car without the front NISMO lip. The NISMO wing actually is functional producing a decent amount of downforce at higher speeds. The Front lip does the same thing which combined means both front and rear downforce. Adding just the rear wing without a front lip in theory could cause some instability at higher speeds; assuming you ever decided to push your car into higher speeds where it would matter. Just something to think about.