Bill, since we have the same motors now (in one channel- I'm still waiting for a replacement 2226H), I'm interested in this. I have a pair of Obligato 22uF's that I haven't installed yet. I have 21uF of combined North Creeks in there now, and they weren't rated high on the review page you linked, but they are serving the DE250 with the poyamdididie (wahtever) diaphragm, and they sound pretty good. How are you figuring them into the bass? Are you using them in the high freq part of the xover? you mean more lower freqs around the cutoff point?