How could I omit Love? Ken is right. A must for any Beatles fan. I could just close my eyes and listen to the show - it's such an experience, almost like you're sitting in the music, hearing it like youVe never heard it before...
And yes, the Bellagio fountains are quite enjoyable - I guess I tend to forget because they're a tourist attraction, so we usually avoid them.
Speaking of tourist attraction, one which I dig is Fremont Street.
http://vegasexperience.com If you like red meat, I personally enjoy Echo & Rig (Butcher/Steakhouse) in a place called Tivoli Village. On the more expensive side, but one of the best steaks I've eaten. If one doesn't indulge in wine or keeps it down to a glass or so, it's entirely possible to enjoy a terrific meal for 2 for less than $150.