Slowly but surely, the state of Japanese restaurants is getting better and better in Montreal. Saiko is without a doubt amongst my Top 3 sushi restaurants in Montreal. The nigiris are absolutely amazing and the quality of the fish is irreproachable. Some of the fish is imported from Japan.
Your best bet would be to do an omakase dinner and let Chefs Yusa-san and Shin Ichi-san know your preferences. Do not be shy and ask which fish is freshest on the day that you are there. Do not skip on the dessert, especially if you love green tea.
My wife and I have been here a few times and are surely about to become regulars. We always had good service, even when we were in a large group.
Before I came here, I didn't know much about this restaurant. Indeed, Saiko does not receive nearly as much buzz as some other sushi restaurants in the city. I first came with no expectations. It is now one of my favorite spots.