It looks like it's going to be Quebec City on the 18th. Quebec City is located roughly 300 km (185 miles) North East of Montreal.
As far as tickets go.. the fight hasn't been announced. Yvon Michel is still waiting for the contracts from GBP.
The Bell Center is not available on that night so it's going to be the Colisé Pepsi. Same venue as Bute-Andrade II and Lucas-Andrade.
I went to Colisée pepsi for Bute-Andrade II and the atmosphere was incredible. But what sucks is that it doesn't have the amazing HD screen that the Bell center has. So you gotta get good seats if you want a good look at the action.