Hi Everyone!

I'm in the beginning stages of purchasing a 2011 G37 Coupe and this forum has been a great source of information and help, but I still have a few questions.

I'm looking for a car optioned as follows:

2011 G37 Coupe Journey
Auto
Sport Package
Premium Package
Rear Deck Lid Spoiler
Splash Guards
Illuminated Kick Plates

According to Edmunds Pricing:
$45,395 MSRP
$41,368 Invoice
$41,311 True Car

Ideally, I'd like to negotiate a final price below invoice given the $1000 Incentive currently in play. Are there any other incentives behinds the scenes?

Also, is the rear deck lid spoiler a manufacturer installed option? Or is it dealer installed only? Of course, I'd prefer manufacturer installed but should I be concerned if it's dealer installed?

In concerns to the Japan disaster, how big of an impact does it have on delivery times? It seems most dealers have cars with Navi on the lot which I'd prefer not to pay for as I personally don't see the value.

I've contacted the three local dealers to Dallas, TX via email (Grubbs, Sewell, and Crest) but none of them seem enthusiastic about helping me purchase. I expected a better buying experience at this point, so much so that I'm considering going with another vehicle entirely.