Hi!
I just got back from Aulani and we went to a luau while we were there. We went to Paradise Cove (not part of Aulani)--- there is a free shuttle from the resort or you can walk there in less than 10 minutes.
The food at Paradise Cove was just okay and the show was good. I have not been to any other luaus so I have nothing to compare it to.
When are you going to Aulani?