Northcreek gets my vote for the most refined DIY speaker company. I've heard many other DIY speakers and always come away with the impression that they are not really as refined, balanced or complete as a decent production high end speaker. North Creek on the other hand is extremely competitive with the best production speakers IMHO. That being said, the best deals for your money are actually production speakers on the used market. I know of no way to get more sound for your dollar than buying a set of used high end speakers on Audiogon.