Las Vegas was great.
I only lost $30 gambling and spent hardly any money at all.
The best bits would have to be the fountains at the belagio But don't try and watch from the front of the pond like everyone else. Instead head up to the coverd walkway on the left which leads to the entrance to the hotel. Its elevated so you get a great view without the crowds.
The Pirate show at Treasure Island is also a must see, but get there at least 20 mins before the show or you'll be right at the back of the crowd and unable to see a thing.