I’ve heard two Horngacher harps played in recitals. They look elegant in a very Prussian sort of way. I wasn’t so impressed with the sound. It was very good up to a point, but didn’t seem to have the strength you may want for symphonic playing. You may also want to check the kind of wood they use and how it will respond to a dry climate. I used to hear that European harps were sometimes made of woods that needed humidity and that they would crack in North America. I don’t know if any of the builders still use such woods, I think larch or fruitwoods may have been the ones. It sounds like they are used to hearing Lyon & Healy. What are the Russian harps like?