In this season in my general area, I could go see the Montreal Symphony Orchestra perform the 7th with Kent Nagano conducting. There is also the 1st and 9th with the Toronto Symphony Orchestra, Edward Gardner and Sir Andrew Davis conducting respectively. Interestingly there is also a performance of the 1st with the Ontario Philharmonic with Marco Parisotto in the same month as the TSO performance. The NAC Orchestra (in Ottawa) perform the 5th with Pinchas Zuckerman conducting. I have not heard Mahler from any of these. Due to timing and expenses, I will most likely see the 9th and possibly the 7th, unlikely the 1st. The 5th... the NACO is the closest orchestra to me, but I *despise* Pinchas Zuckerman as a conductor. He isn't one! The NACO was a decent orchestra, but he has all but destroyed it, and I can't stand any of his conducting. If I were to go see him conduct Mahler, I fully expect to come away utterly disgusted and aghast at the this terrible state of affairs...
For music, I am very envious of people who live in NYC, Berlin, Vienna and other great musical capitals.