Ka was the only Cirque du Soleil show (not counting the Beatles or Elvis tributes) I haven't seen, mostly because tickets were so hard to get and so expensive...until we finally sucked it up and saw it this weekend.
Man, oh man, after all these years, why'd I have to be so cheap? This show is worth every freakin dollar!!! Without spoiling it, the show is expensive because they're still probably paying off the architect for the stage that was built for this show.
Ka is seriously a must see show. I almost want to say it's better than "O" but that's impossible. I will however say, Ka is 98.9% close to kickin "O" from it's #1 spot, in my own opinion of course. ;)