I recommend walking down the beach path to Longboards at the Marriott (the timeshare two lagoons down.) The food is good, the view is great, and the tropical drinks are even tastier than at Aulani. They have live entertainment Friday and Saturday night.
I hear they have a good (and cheaper) buffet restaurant there too. I hear breakfast is pretty cheap, but we didn't check that out.
We also at at the poolside restaurant at the J.W. Marriott (right next to Aulani.) It was just okay, but it was nice to have different choices than the offerings at Aulani. There is a pool with hammerhead sharks swimming around there which the kids enjoyed. They have a restaurant inside too that we didn't check out.