Wayne- You've mentioned in the past that you liked the 10MD26 in your Midhorn. In your opinion, what is the character of its sound, as compared with the Delta 10A? Would the rear chamber volume need any adjustment? The Xmax is kinda small; will it play down to 250Hz? If it's not a noticeable improvement, then it's not worth the price difference!Speaking of other drivers, did you ever try the Kappa Pro-10A in the Midhorn? Most of the specs look OK, but the Fs seems like it might be too low....