If yer going to Ole Mexico, I found some stuff called Regimentio that was pretty yummy. They do tequila like we do microbrew.
IMHO, as for what's available up here, Patron is good, but Herradura is good for cleaning my battery terminals, and that's it.

Liquor stores will let you taste test down there so take your time and ask the clerk. You get a free buzz by the time you're done.