We chose Valentino for our last meal of a 6 month round the world holiday and it was spectacular.
We got the 5 course tasting menu with matching wines. eg
Lobster Carpacchio with watercress and blood orange with a sparkling rose!
Duck Prociutto with sour cherry glaze
Venison with gnocchi
It was busy there but there were lots of little rooms and quieter corners which I am sure you could pre book. Service was fantastic - the staff were very knowledgable about the foood and wine. THe bill came to app. $320 US for 2 including tip. Worth every penny. It was fantastic.
Located in Venetian Hotel on the strip
3355 Las Vegas Blvd. South, Las Vegas, NV 89109