Where to begin, what to order, which margarita to try first, which to try after that—these are the challenges faced by Agave diners. There’s just so much! The solution: Go often! A good start: The ceviche, nachos, and the best-damn-guacamole-in-town. There are over 70 different margaritas, so giving careful consideration to the cocktail menu is a must. Entrées are awesome—period; there’s no going wrong. Authentic Mexican with an upscale Newburyport twist is what awaits hungry goers (and make sure to go hungry, ‘cuz there’s a whole world of food awaiting).