if you MUST choose, get sport it's the better value and more important features. If possible get both though I love mine

So, kind of along these lines:

I'm looking at getting the sport (6MT of course), but would like to have that nav. option. It's not available when building on Nissan's site, but would the dealerships allow purchase and install on a base + sport?

It would be more expensive if you have the factory nav installed on a used Z.

http://www.the370z.com/audio-video/1...avigation.html

If you going for the 3rd party route, its easier going for the base model. The way the wiring is, You have to replace everything if its bose.

And I agree the posts above. If I had a choice, I would go sports package and go with a third party on speakers/nav later down the road.