Awesome, congrats and welcome to you and your wife. I've got the Stillen Gen3's on my 2012 7AT also and really like them...the sound of the engine changes as does the kick in your pants when you mash the throttle
I drove manuals for the past 9 years and I have to admit that the auto is no slouch when driving canyons. You'll find this community very supportive and full of information.
P.S. You gotta post some pics of the new Z when you get a chance
