I wouldnt recommend Matte to anyone. I love it but its a hassle and its even more of a hassle for the bodyshops as it doesnt allow them the ability to color sand out any blems. Oh well, I'm fine with an 8 or so and don't need a 10 on the paint quality.
I too added the grounding kit, for 100 bucks, why not? Seems cool so far but I never pay attn to mileage so havent a clue if it helped
After seeing that beautiful red Z on that trailer, the one with the wheels and kit, I'd stick with Red. Its going to look awesome PLUS it will be much cheaper to paint since your door jambs are already red.
I talked to RAW about you today when I dropped my car off. They can help you with the bodykit mount and the paint, all for a good deal when your ready bro.
talk to you soon man