It comes down to how much do you want to spend and how far do you want to walk.
Besides the ones mentioned so far (which are all fine choices) you could also consider
- Planet Hollywood
- Caesars
- Wynn
- Mirage
For Paris/Caesars/PH if you'll get the value out of it the Buffet of Buffets might not be a bad idea (though notice the "upgrade charge" for Caesars/Rio):
https://www.caesars.com/las-vegas/buffet-of-buffets