I'd agree with Poznan.
The Stary Browar mall is excellent. Great shops (210 retail units), plenty of cafes including some quite posh places in the outdoor area at the top.
The mall is in an old Brewery, the architecture is stunning and its very clean. Better than any I've seen in the UK/USA.
starybrowar5050.com/architektura
flickr.com/search/?q=stary%20browar%20poznan&w=all