Did you replaced the shocks/struts after lowering it? If not you may want too, my friends struts blew out on his '10 GT500 after not much driving. He now has Tokico D-Specs in it.
I like the car a lot and I'd leave the stripes alone. That was a STEAL. I am surprised you got rid if your car I thought you had a pile of $$$ and time in it???
I'd do a panhard bar, adjustable upper, and some lowers along with relocation brackets.