I would have to say that FJ is certainly giving away to others in that market place now... I havent tried the Merino socks yet but I was an avid kentwool sock rocker up until recent where I have been doing swiftwick due to the heat of the summer....open to new FJ offerings though!
I am surprised you haven't given FJ ProDry a look. Unbelievable in the heat! Solid arch support and come in a variety of colors/cuts