OK, I should not share this secret but you are all such a great bunch of folks here goes...
Hands down the best buffet in the history of Las Vegas is(this not just my opinion but the consensus of the food and beverage industry of greater Las Vegas), .... (drum roll here),
The "M" Hotel and Casino located at the very south end of Las vegas Blvd, aka the strip. It is literally about 12 (?), miles south of MGM, Luxor, NY, NY etc., but worth the drive (don't even think about taking a cab). We were turned on to this place by some locals and it is almost exclusively locals that go. The hotel and casino are as beautiful as Bellagio, just on a smaller scale.
I recommend the brunch buffet which starts at 1030 and a year ago was $16.99. You have never experienced a buffet like this one. Every single thing I put in my mouth was the best ever, the selection is unbelievable, beer and wine (draft and from bottles), is complimentary. Don't miss the coffee bar and dessert area though it is hard to miss as it's huge. Allow some serious grazing time as we spent about 2 and half hours there each of the two days we went.
Seriously folks, you have never experienced a buffet like this one but do not take my word for it. I cannot even begin to imagine what they do for dinner but some day I will fast for a week and find out. Bon appetite! :B