I am watching domestic breeders, I have two very nice Kohaku I picked up recently that I am watching very closely. The problem really is that the domestic breeders really aren't producing enough quality Koi yet. I am sure they will, but why should we buy them now when it can not compete with the Japanese market.
I actually do buy domestic Koi from a domestic breeder and sell them in my store. They are priced for the pond owner that wants something nice for less.
I am in close contact with one domestic breeder and we talk pricing. He can not produce koi for the same price I can get them from in Japan, including shipping. I think this is the largest stumbling block, aside from over all quality, that keeps me from buying more.
After seeing the quality you have, I would be interested in visiting your place. Could you PM me some info.