I conceptually love the idea of a blind test, but I have to admit an extended blind test may be problematic. It would not be impossible to set up but expensive.
In any event, I think all this bosh about blind tests being ineffective for subjective reasons is pure bosh written to appease the subjectivist manufacturers. Read the John Atkinson thread and get a load of bosh dumped on you...
Revel (Madrigal/Mark Levinson) has a great facility or speaker blind testing. There's a company I respect.
http://www.audioasylum.com/forums/whine/messages/8258.html