Starting now? That's a tough one, because the numbers on available residency slots are about to plummet, and by the time you graduate there will be very few positions available for IMG/FMGs in the US. Canada is already brutal.
If you are comfortable with possibly working in the EU, at least for a while, then the EU route could be all right, but you would be turning down a McGill education. Remember that the EU also has 4-year programs for people with bachelor's degrees, and some of them are very competitive. Still, though, getting a match in 5+ years' time will be far from automatic according to the AAMC's numbers.
Tough call. Good luck!
"To array a man's will against his sickness is the supreme art of medicine."
- Henry Ward Beecher