Keller and Coppell double tounging at 170 - difficult, but Waxahachie triple tounging at 162 is not? What about the 70-90 note chromatic and scaling runs done by both brass and woodwinds. I am obviously biased (being a Hachie parent), but their music is extremely difficult and they execute very well - AS DOES Keller and Coppell, and many other bands in this area.
FYI - I second your picks for BOA SA and wish all bands competing best of luck!