i can actually help, i live in flagler beach about 45 minutes north of there so i have cased out the whole area. the are a couple good ones about 15 north of new smyrna.
the best one i have found is called THE FISH TANK, they have a nice selection of corals.
another one is a little farther away in flagler where i live and its pretty much the only store i would go to. its called JUST FISH and its on route 100. nice selection of corals, nice fish, and dirt cheap cured live rock. i would reccomend going here if you dont mind a little drive.
just map quest them. if you cant find them i can tell you how to get to the one in flagler.