By far the best show I've seen would be The Cardboard Vampyres. They only are suppose to play 6 shows this year, if you get a chance you have to go. Jerry Cantrell and Billy Duffy are amazing together and their vocalist is awesome. They just play a bunch of cover songs with Alice In Chains songs thrown in. I saw the Doobie brothers, Allman Brothers, and Shinedown all at Summerfest this year, but Cardboard was the best show the whole week.