Based on listening to the Tetons (they are impressive)owned by Dave Clark of AudioMusings, I decided to buy a pair of the WindRiver GS speakers. I know it sounds crazy, but I did. I did it based not only on what I heard, but also based on my dealings with Rick Reimer: he's top-notch. He has spent an incredible amount of time on the phone explaining the art and science behind the speakers and providing helpful info on associated equipment.
I don't expect to get them for several weeks, but I'll be happy to give you me assessment then. Let me know if you have any other questions.
Bill Devaux