I just bought the 12s a month ago. They bested a few other cables I have - Zavfino, Driade Flow 405, Anticables 4.2.
I would be interested in hearing comparisons with the Anticables 4.2. Those just came out, so maybe you got an advance copy.
Two things I should have mentioned in the original post:
1. This will be a long run, with 28 feet to the farthest speaker. One of the good things about Anticables is that they can tolerate long runs well due to the minimal dielectric material.
2. If I go with the SP12, I will do a double run in either standard biwire of parallel biwire (jumpers added) configuration.
I remember talking to captain as he was auditioning his 12's and man he was jacked....had the the 9's and were a very descent set of cables.
Perhaps I was wrong and the SP12 is a major step up from the SP11.