It depends on what you're in the mood for. They are all good, and ultimately they are variations on a theme. I'll just run down my experiences with them or what I've heard about them.

KA (MGM Grand) - Haven't seen it yet, but from those I know who have seen it...it was good.

O (Bellagio) - This show is *awesome*. The use of the water just kind of makes it way more impressive & classy. I loved every moment of it.

Zoomanity (New York, New York)- Randy fun. Of course this one is a bit randy compared to the others. Everyone is in a thong and topless, so there is that element. However its not trashy, and the acts are still impressive, clothing or no. It was a good show.

Mysere (Treasure Island) - Old school, but still kinda cool. This was the first one I saw, and they just got better from there.

Love (The Mirage) - This one is set to Beatles music. I haven't seen it yet, but I heard that it was good. You should love this show if you like The Beatles.

Believe (Luxor) - This show is, well, like a blend of Criss Angel and his warped mind, and then add on some cirque. From what I've been told it has a "Donney Darko" kinda feel going on (scarry bunny costumes and all that). Next time I'm in Vegas, I plan on checking this show out. I'll just repress the Criss Angel parts if necessary.

If this is your first one....I'd definately do either O or KA.

~Jeordam