I've been to hundreds and hundreds of concerts, all types of music and all types of venues and hands down the best show I ever saw was George Clinton and the P-Funk All Stars. It was the One World Music Festival west of Austin, outdoors out in the middle of nowhere, wish I had been there for the whole weekend, James Brown headlined Fri Night and Bunny Wailer on Sat Night, George Clinton on Sunday.
Found a cool little spot on a small hill near the stage, had just the right amount of fungal encouragement and got all kinds of funked up. Pretty good sized stage with different levels, so much going on through the whole show, there were dancers, singers, musicians spread out across all the levels, the lights, dancing, music.....just a sensory overload. The highlight was when the Mothership landed on the stage and Dr. Funkenstein came out of the spaceship...... definitely a WOW moment! They played 3+ hours, no breaks, no stops, just full force funk!