I'm in Barcelona for work in a few weeks and will have a couple of hours to myself so obviously I'm going to go shopping. 
I plan to visit Zara, Massimo Dutti, Uterque - am I missing anywhere? Also any thoughts on Uterque, has anyone actually tried their stuff? I'm thinking of wandering up Passeig de Gracia, but can deviate if there's something worth visiting elsewhere.