Not really a whole lot of good Tex-Mex here, but damn there's some good Mexican places. One in Orange City, called La Hacienda, is damn fine, you get a ton of food, and it's cheap (like Mexican food should be). There's another in New Smyrna Beach called Mi Mexico...fucking fantastic.
As a guilty pleasure, I LOVED Chevy's, but they call closed (except for one down in the tourist part of town...fuck that)...their fajitas were the tits.