Getting ready to pull the trigger

I have the dough ready and am getting ready to order a GT 500. Since there's not much season left in the Northeast, I am planning to research how and where to buy, and what options to get and order in the fall. I am leaning towards:

2008 Shelby GT 500, torch red convertible
I want the white over-the-top Le Mans stripes, even though it's a convertible
Black leather with red inserts interior
I think I'll pass on the Shaker and Nav and go aftermarket
I think I'll own it a while before modding it, probably go into the 600 HP range down the road

Any other (dis- or ) recommendations on options?

Thanks!
TC​

 

Thanks for the advice. HID Headlamps sound good, and the painted stripe. I was surprised by the advice on the stereo. In my past experience, factory sound systems no matter how nice or how they're branded have been a POS and overpriced. My buddy has a Mustang with the Shaker in it, and the design with the separate amps, etc seemed hokey. I put an aftermarket radio/cd changer/amp/speakers in my Bronco and for under $1500 it sounded SICK. If I want to take my time deciding, is the Shaker a dealer option?

Particularly on the navigation system, anyone have any opinions? My wife has the Acura/Honda one and it is one of the best out there. Great touch screen and voice activated system, easy to use, good POI data. Through a car club up here I got to drive some Ferrari's, a Lamborghini, Maserati, Porsche, etc. The Acura nav was better than all of them, so we're a little spoiled.

Anyone ever put a kid's car seat in the back seat? Feasible?

Thank you all!
TC​