My old roommate used to feed Blue Buffalo to his finicky domestic shorthair mix (Arrow) because it was an all natural
cat food that didn't contain corn, wheat, soy or any chicken by-products. Arrow loved every bit of it! Although, I preferred to use Solid Gold, which is another type of natural food, Blue Buffalo is pretty good too.
@iluvkittens: You can go to a petco store or the petco site. My roommie did the Repeat Deliver service from petco.com and got a discount on each order of cat food he placed.