Fred, What's your opinion of the 15 or 18" open baffles. I know you cannot say much without having heard them. Do you think they are worth a shot? I'm a little concerned about the 63Hz roll-off. I would like to have an another bass octace without having to fill in with a sub.Like you, I wish they would come to the GPAF. Even though I'm not going to be there, I would still like to hear from someone who has heard them.....Colin