Until a few years ago, I lived in Vienna, Austria. So, I speak from experience that the upcoming Photo+ Adventure photography and travel trade show is worth attending if you happen to find yourself in Vienna Nov. 16-17. The show offers the usual mix of gear, talks and demonstrations. Some stores offer special deals on gear. Actually, a visit to the Photo+ Adventure show has been the only time I considered buying gear in Europe. In the end, I didn't, but some of the prices came close to buying stuff in the USA.
For more information (in German) go to photoadventure.at.