Well, I'm sorry to say that my trip to Bikes@Vienna turned out to be rather fruitless. They do have a good selection, however, the salesman I got was for some reason extremely curt and even rude, and acted as though showing me a bike was a big imposition. I test rode one bike, and left.
Given the difficulty I'm having actually getting to test a variety of folders, I think I may just get a good road bike, which is easier to come by, and some good locks.