Just got back from Vegas last month, I loved it!
Defo do the Canyon by heli, absolutly amazing! Battistas Hole In The Wall for a shit hot Itailian, dirt cheap and all you can drink wine too, you will defo have to book up ahead thou. Also Tao for amazing Oriental Fusion food with amazing service in awesome surroundings. Other than that just get around the Hotels and check all the cool shit in them out