The best part about this tour is that The Mars Volta (!!!) will be playing with System of a Down on ALL tour dates. If this comes through Calgary I'm definitely going. Apparently the tour will be in small venues only. So if it comes to Calgary it'll likely be at Mac Hall as opposed to the Saddledome or Corral (which, IMO, is a very good thing)
P.S. REDVAN, if SOAD is too weird for you I wouldn't even try listening to The Mars Volta.