My ultimate favorite restaurant in Las Vegas is Chinois, Wolfgang Puck does Chinese like no other. The Kung Pao chicken is beyond belief. It's not on the menu so you will have to ask for it. There is not a single thing on the menu that is not good.
Check out a few more Chinese Food restaurants in Las Vegas.
If you are looking for a comfortable place with good quality and average prices consider P.F. Changs at the Planet Hollywood Hotel
If you are looking to go a bit more upscale try Jasmine at the Bellagio Hotel.

