Look for a food which has a minimum pure meat content of 60%, and is grain-free. Cats cannot process grains, and they are used as useless fillers in pet-foods. Carbohydrates will damage your cat's health over time. Do not feed dry, if you want your cats to live healthy lives. It's great that you've already decided not to feed them dry, but most wet foods also contain carbohydrates, in the form of cereals, so the following applies also:
The Truth About Dry Cat Food from Blakkatz

Try to find an organic, high-meat, grain-free wet food. That will be the best thing, next to a raw diet, that you can do for your cats. Good luck!