Rock the Bells this year has a pretty amazing lineup:
September 7-8 in San Bernardino, CA.
September 14-15 in Mountain View, CA.
September 28-29 in Washington DC.
October 4-5 in Rutherford, NJ.
If you live anywhere near these places then you need to get on these tickets as soon as they're available starting May 16. Prof is on the Saturday lineup for each location.
Added August 8th: A new track just for this