I read your post in AVS spiffnme.
Well done.
My suggestions for improvements:
1) same as yours, listen blind, use score sheets with numbers but not names (only one person should know how they match up and they would not be listening or at least not include their ideas in the pool)
2) listen w/o the sub, after all, they are head to head speaker on speaker and the sub adds an additional element
3)YES, add more music types BUT allow each listener to take as much time as they want with their OWN music
This process would take more time than a single evening depending on how many ppl show up but its the only way to get individual results of ppl sitting in the same spot, not knowing what speakers are on at any given time but using material they are familiar with.
Finally, once the listening is done, gather the score sheets together and finally add the numbers to the names to find out which brand may have scored highest.
You can always rank for build quality and looks afterwards.
I will give alot more credit and respect for the scores of such a test. Apparently Amie even sent along some speaker grille material for them to use in blind testing, and yet they did not bother.
