When we're drinking a margarita, we'll pass on that name-brand $30 shot; what we really want is lime so tart it stings, salt that flakes on our lips, a blend of the hard stuff that's not too heavy on the orange liqueur. And after tasting hundreds of margaritas across the Valley, we found that very combination at Padre's Modern Mexican Cuisine, the cheerful bar and grill just west of the Biltmore on Camelback Road. The house margarita ? a mix of Sauza Gold, triple sec, and fresh lime and lemon juice in a tall glass over ice ? is just $5, and so damn good, we guarantee you'll beg for a pitcher.