You can't go wrong with Wicked Spoon for lunch or dinner for what they offer! Good for large groups as well. Dinner is more expensive but I would prefer lunch as they still have a lot of good dishes like prime rib, pork belly, bone marrow, sushi, seafood, etc. if you think about it, at a regular restaurant for a couple can go up to $150+ easy!! The service is good, the place is classy and not as busy as you would think. It's located deep in Cosmopolitan but they make you walk for the food you will eat. At least, they have bathrooms within the area and you don't have to go outside the restaurant...that is my pet peeve!
This is a must try! This is my regular buffet place we head to when we visit Vegas. =}