What Pet Food Is Good For A One Year Old Cat?

I just got my first cat, and he is about 7 months old now. I know I should switch up his food soon from the kitten formula to something, but I want to know which food is best for him. I know foods like Purina and such is like feeding your cat fast food leftovers. (and in some cases spoiled leftovers lol) So I want something good for him, but a lot of the brands I see like Wellness is $13 a bag. Any suggestions on a happy medium?