When we went to Vegas we stayed at The Venetian. There is a cafe there called The Grand Lux. Great food, reasonable prices, super service, nice bar. We ate there twice because it was so good.
We also ate at Emeril's Delmonico .. don't go there !!! It is not as advertised, it is super hyper major expensive, they request that you dress nicely ... we got there dressed very nicely and found a loud place full of people is shorts and cut-offs and sweatshirts, there is zero ambiance and the service was horrible. The steak was good but for $99.00 it should be. Oh and if you want anything extra like maybe a baked potato get ready to shell out additional $$ .. a HUGE letdown.
As mentioned above Bobby Flay's Mesa is good.
If you want a fun time go to the Excalibur and do the Tournament of Kings dinner. It's jousting while you eat .. lots of fun and something out of the ordinary.
Have a great time and let us know how it was !!