I also enjoy the Don Julio tequilas, but one of my favorite tequilas if not my favorite is La Puerta Negra Joven (it doesn't cost a fortune and its in this link here:
http://www.tequilabottles.com/db_pub...iew.php?id=463)
And I know that the PVR Wal-Mart has all the tequila that you could ever ask for... and a great tour guide I had in PVR (still talk to him today) told me that in general, any tequila you buy in Mexico is better in the states. The Jose Cuervo there is MUCH different than here. Oh, and if you enjoy Corona's, you'll love Pacifco.