It depends on what you want.
If you want Tex-Mex there's a lot of that, like Casa Ole.
New Mexico-Mex Chuys is the closest so I'm told. Mex-Mex, people say that Del Sol place is pretty good.
For Baja go to Fuzzys Tacos. For So-Cal for to Easterwood, buy a plane ticket to San Diego, and have a cab take you to Los Panchos or Plaza Del Pasado.
Abuleos is ok too.