Casa Sanchez are hands down the best chips and salsa, period. Available all over the Bay Area and beyond, you can even buy it online. I love the thick 'n' crispy tortilla chips ("gruesos") and the hot salsa.
Casa Sanchez products are delicious, period. I'm especially partial to the thick tortilla chips, which have a particularly satisfying crunch, and to their hot salsa fresca, which is unparalleled. I'm not in the Bay Area as often as I'd like to be these days, but now that I see they're available online, I will definitely be looking into placing an order!