Have you thought of Pro-Dyno in Fort Mill SC (just south of Charlotte) I know it is a hall from Jacksonville but I have a friend who swears by them and he drives up from Columbia SC. I plan on using them when I add a Paxton, they are about 2 hours from me.
Pro dyno tuned my car last, Dan is a great guy and seems to know his stuff!
I'd recommend them any day. I believe amazon tuning merged with boosted performance in mooresville also, but I don't know muh about em
