What are the best wet and dry supermarket foods?

I know this has been asked a lot, and I know a lot of people say the supermarket stuff is crap but the closest pet food store is 50 miles away and my vet's office hours are so few that there is no way I can make it there to buy food. I also live by myself so money is a factor. My 2 kittens (Sebastian and Ariel) are 9 mos. old. I feed them Purina kitten chow but will be switching to adult food soon. Sebastian just had a mild bladder infection so I am going to start wet food as well. Any suggestions? And please, I only have access to Wal-Mart close by so only things that are sold there. Thanks!