Everyone is just telling this young girl to get a "premium kibble" and isn't giving her price compatiable suggestions. I doubt she's going to convince daddy to buy $60 - $80 30ish lb bags of Orijen when he looks at the dogs and thinks they are fine on Beneful.
Kelina, what petstores do you have available in your area? It will help people better help you pick a good food that is not too expensive. Do you have petsmart, petco, pet supplies plus, how about tractor supply company? Google if you aren't sure. TSC (tractor supply company) and the other stores main webpages should have location finders on there where you type in your zip code and it will tell you where the nearest store is.
If you have a TSC you can shop at, I would recommend their house brand called "4 Health." It's a good food at a good price and the dogs will probably like it. You could also try Diamond Naturals, even the regular diamond would be better than Beneful and should be about the same price as Beneful.
Don't worry too much about your puppies right now. Take good care of them, love them, socialize them, obedience train them, and if problems come up in the futuer, we can help you deal with them as they come up. No sense stressing youreself out now about things that may or may not happen in a year or two.