if you are looking for the cheapest , here you go http://samifruits.com/Montreal.html
might be a hike but the area it's it has tons of great middle eastern shops and if you have a car it's no biggie
my personal fave super market is PA , they have a location downtown and one in Mile End , really great prices on produce http://www.supermarchepa.com/eng/index.html
Jean Talon Market is also great , the local produce can be really cheap in season , especially if you are buying large amounts http://www.marchespublics-mtl.com/English/Jean-Talon/
I'd avoid it on weekend though , it gets kinda intense
I'm not a huge coffee nerd but I tend to buy either Santropol (it's fair trade , organic , locally roasted and avail in tons of bulk/specialty or health food shops) http://www.bruleriesantropol.com/en/
I also sometimes buy this one from President's Choice (store brand at Provigo , Loblaws , Maxi) http://www.presidentschoice.ca/LCLOnlin ... rod1110053
It's a good price/quality ratio and is fairtrade but I'm not familiar with the brands you mention so not sure how this measures up.
Segal's is a Montreal instituion . It's a small discount grocer that has lots of organic and vegan products. Best place to buy dried beans , tofu , soy milks , and stunt meats. They have a big section of Bob's Red Mill stuff , way cheaper than the supermarkets. It's kinda messy and disorganized so you have to dig buy when stuff is on sale , it's nuts.
The produce is hit or miss though , and the prices are really better for packaged goods than produce. There's a man who works there who's always quick to tell me about new vegan stuff they carry or if the brown rice is on sale. He's middle aged , on the shorter side with red hair. Balding on top. If you see him stoking shelves and are looking for something , he is the treasure trove of vegandom. https://foursquare.com/v/%C3%A9picerie- ... 93bbe4c262