Well, circling back to this thread, I did end up getting the SW 112 to pair with the 115 and I really love it. It’s sweet by itself but it really sings with the 115. I don’t think you can go wrong. Lots of fans of having two of the 115s, but I like the way the slightly different voices play together. To me, I don’t know, it almost seems more like a duet of bass magnificence.