Another event in Calgary that is most worthwhile to consider attending, is the Honens International Piano Competition, held every 3 years in Calgary. The next upcoming competition is mid October of 2012.
A lot of the preliminary performances by the contestants are free to attend. There is a charge to attend the final competition though.
You can find more info about this international piano competition here:
http://www.honens.com/AboutHonens.aspx
And past winners here, it would be worth your while to look at these past winners and keep them in mind if and when they come through Calgary again.
http://www.honens.com/Laureates/Past-Laureates.aspx
Xiang Zou was the youngest to ever win this competition in Calgary. He won in 2003 and for his final performance, he played Rachmaninov's Third Concerto, unbelievable performance.
As part of winning the Honens Competition, the winners are matched up with various well known individuals in their field for future master classes, and they are scheduled to give various performances for 3 years....so it kind of sets these winners up for future endeavors. I was in attendance when Xiang Zou was back with the CPO in 2005, and he played Mozart's D Minor Concerto. Just an awesome performance, he has such a presence on the stage.