I'm from the Reading area which is a drive for you, but there is a lot of good mexican in West Reading. This list is mostly on your side of Reading so its like a 45 min drive.

La Abuela - family run traditional dinners (probably #1 in the area)

comalli taqueria - hipster taco place

Lets Taco Bout it - more traditional taco place

Bunch of chain places too, Plaza Azteca, On the Border, Alebrije (latter is probably the best of the chains. also the smallest)

Thai Wat - Tradition and best thai around

Origen Latin Fusion - Hipster Latin food