Chez Vito is one of my favourite butchers in Montreal. Friendly service and great small-talk with the guys when you come in and they will always help you find the perfect steak for you.
Honestly, whenever we are in the mood for steak, we'd rather go buy their marinated bavette and cook at home instead of going out. The marinade is very simple (oil, paprika, steak spice, salt, pepper) and not overpowering. With a cast-iron pan and some animal fat for frying, you can make a restaurant quality meal in no time.
Another great thing about this place are the wonderful Italian products they import. The other day, Dino had me try some special Mortadella he had imported (the name escapes me). It was soft, perfectly flavoured and melt-in-your mouth good.
If you're looking for a butcher in the Plateau/Mile-End, look no further. Chez Vito ranks among the top 3 butchers in the city and his prices are very reasonable.