I would go to Jiko at the AKL. It is a beautiful, quiet restaurant without a lot of children. The service is outstanding and the food is delicious. We ate there in October and it was wonderful.
I think the California Grill is good, but there are many children and it can be noisy. We don't care for the Yachtsman Steakhouse food. The atmosphere and service were great, we just didn't enjoy our meal. I have never eaten at ARtist Point, but many love that too.
Have a wonderful time