If you're near a Petsmart, you might want to check out their Authority brand (wet and dry). Or, Nutro Max isn't too pricey. One thing to remember is that sometimes the food that's initially a little more expensive ends up costing about the same, since you may feed a smaller amount of the pricier food.
But, don't kick yourself if you can't buy some super-duper organic, made in teeny tiny lots by loving hands food - many many cats have lived long and happy lives on less expensive, grocery store food like Friskies- besides, you've got to budget for your baby's health care, as well keeping a roof over both your heads!
Also, in many instances words like 'natural', 'human grade', etc., have no real definition in pet food at this time. Sounds good, makes us feel good, may not really be a difference in the actual food.
In any event, check for the AAFCO certification on the food you buy. That is a standard nutritional definition - per Wikipedia, "In the United States, cat foods labeled as "complete and balanced" must meet standards established by the Association of American Feed Control Officials (AAFCO) either by meeting a nutrient profile or by passing a feeding trial. Cat Food Nutrient Profiles were established in 1992 and updated in 1995 by the AAFCO's Feline Nutrition Expert Subcommittee. The updated profiles replaced the previous recommendations set by the National Research Council(NRC)."
Honestly, I wouldn't buy anything at the dollar stores food-related, human or pet, without checking very carefully the sell-by date and the manufacturer. Remember that Chinese toothpaste that was bad for people that the dollar type stores were selling?
But, I know what you mean - I feed Nutro and I swear my cats are eating better than I am these days!