Thank you Digipete, it is true that we have not had an official comparison type review and WE know the difference here and those who have had their 150's upgraded also have heard it, but I appreciate your feedback here.
We still have ONE KWA 150 Sig. Ed. demo unit available from RMAF 2011. We initially only planned to take one, but then decided to upgrade the Fritz Audio room to our higher end amp, so we have another available now. Please check thread above about RMAF demo's or call us if interested.