I also live in Dallas and had a feeling Fuel City would be #1 or close to it. Apparently, there's a taco place a few miles away in Bishop Arts that is 2 cents cheaper, but I bet they don't have outdoor block parties with live DJs, longhorns on site, a swimming pool with a statue of a velociraptor, or a huge neon sign over a gas station saying "Where Dreams Come True." I'm sticking with Fuel City. There are downsides hard to account for with price alone, though. Riverfront Blvd has been under construction for 7 years and hasn't had usable sidewalks in longer than I can remember, so you have no choice but to drive there. Plenty of other places I can walk to, so in practice, that's usually what I do.