I've bought my last three speakers without hearing them--and haven't been disappointed yet. I have a close relationship with my dealer, and we both have similar listening preferences, so that's a BIG plus. Always buy from a dealer you can trust--and who respects you not only as a customer but as a human being. I've dealt with a lot of shitty/shady audio dealers in my time, and, believe me, once you establish a relationship with one you trust, it's like a breath of fresh spring air.
Ironically enough, my most disappointing speaker-buying experiences have happened when I auditioned them in the store. To a speaker, not ONE sounded as good in my home as when I heard it in the showroom.