I thank you all for your responses. Last night, I tried 470ohms, 100, and back down to 10ohms. 10ohms seems to work best for my equipment and temperament. Golden Imports Symphonies Nos. 1, "Nordic" and 3, Howard Hanson, sounded outstanding. I'll just stick with 10ohms for a while, it seems the best fit. There is no way to get between 10ohms and 100ohms, by the way.
Thanks to all,
Dan
Thanks to all,
Dan