Dog trainer in the toronto area

I was wondering if anyone could point me in the direction of a good dog trainer in or around Toronto. Im about 30 minutes outside Toronto. Ive been searching for a good trainer who deals with dog aggression but cant find any that I like the looks of. Duke basically has what I call selective dog aggression. He has full blown leash aggression but when off leash hes great with any dog hes known from when he was a puppy and then very selective with new ones. He is 2 now.

Which direction? lol obviously not south, but knowing generally where you are would be easier.

I've had very postive experiences with both McCanns (Dundas) and Sue Alexander (behaviourist in Guelph).

I drive a distance to see both and recommend them both.

Im in Mississauga. Im willing to make a bit of a drive for the right help.

All About Dogs which has two locations in the City is also good.

Thanks for pointing me a direction. I will check out all 3 of whats been suggested. Thanks again