I'm not a Vegas lover, but I have to say that going there a few years ago was totally worth it for me because we also did a helicopter tour of the Grand Canyon. Just jaw-droppingly amazing. For someone who doesn't have much time to do justice to the canyon, it's a great way to sample it. (And we're going back for a quick weekend trip in a few weeks for a concert -- Vegas is well-priced enough to make that sort of trip do-able.)