I'm not much of a show goer but Celine Dion at Caesar Palace was without a doubt the best for me. She has an incredible voice and her biography was very interesting. Celine has to be my best show. David Copperfield was maybe my 2nd best at MGM. Tournament of Kings at Excalibur was okay and the dinner consisting of squab and tomato soup was pretty good. I'm thinking of Donnie & Marie in April/May, should I purchase the tickets online now in order to lock-in a good price now or wait and purchase the tickets in person at one of those discount ticket places in Vegas to try and get a better deal knowing the risk of it possibly selling out?