any suggestions on hip/edgy fashion boutique in Venice? and where in Venice do they sell Comme des GARCONS?

I don't remember the exact street name or location but the streets near Piazza San Marco have some really nice boutiques. Just take a map and have a look around.

CDG doesn't have any boutiques or guerrilla stores in Venice so I think it would be easier to buy from their e-shop.
http://shop.doverstreetmarket.com/index.php?cPath=63