Unfortunately, I am interested in all of them. I have yet to use any of the French hones and would love to play with some of them some time, but have not been able to find one yet. I am continually fascinated by the variety of Japanese hones and Rodb, I will be happy to let you try a few some time.
Along the same lines as Glen, I have two, but only two hones, for which I have no use. Randy's had them for a couple of years but I'm in no rush for them to come back. Let's just say that not all "natural waterstones" can provide the perfect edge.