I would buy it on DVD too!! In fact, I recorded every episode on my DVR and haven't deleted any of them. From the very first show, that way I can go back and see how they were in the beginning. And I can go back and watch some of my favorite dances again.
I'll have to see if they are coming to my area on the tour. I'd love to go see them. I saw American Idol tour the year Chris Daughtry was on it.