soundcentral is the 'punk/hc/metal' store for montreal. its pretty rad, lots of rare stuff locked up but for reasonable prices. found the original pressing of the disrupt - st ep which was cool. unusually high proportion of doom and stoner metal-oriented stuff.
paul's boutique is literally around the corner on st. laurent and is cool too, but you're gonna do some digging. there isn't much rhyme or rhythm to the place, there's no till or anything, just boxes and boxes of records. i guess i looked like i was done browsing cause this french dude wearing sunglasses inside the store danced up to me and asked me if i wanted to buy something, glanced at the one-eyed god prophecy lp in my hand and said $20, put it in his pocket and danced away. there was a suicidal tendencies st original and some other gems, worth checking for sure