Perhaps info on where you are staying or what kind of menu you prefer would get even more good replies.

When I go to LV I usually travel with a group of people who have limited budgets. So we generally go on the cheap. However, one place that I have gone to and try to go back to whenever others can afford to go, is American Grill(?) at RIO. It is, kind of expensive and for most of us a special night out. Usually we try to go on our last night there.

Almost 10 years ago I started going to Vegas each year and we stayed at RIO. We went to American Grill and have tried to keep it a tradition. It has been about 3 or 4 years since I have been there. Don't know if it is still any good but It was great last time I was there.

I have also read several recommendations of Michaels although have never been there. That recommendation comes up a lot when I research my trips.