I stayed at Mandalay Bay & their buffet was good. I believe MGM Grand has an excellent one. The best suggestion is to go down to Mandalay Bay. They have a monorail between them & Luxor & Excalibur, so you can go to 3 buffets without traveling far. Also, MGM is across the street. One thing about the casinos, they are several city blocks. So, if you don't like a buffet, you'll either have to walk down 5-6 blocks to the next casino or catch a cab or bus to the next one.