Mike, I love to study the likes of different koi kichi's. One of the things I've learned about you is that your a fundamentals man. When you pull up the page with the sanke you like on it and look at the left and right, you can see the promise of body shape on the one you selected. This fish will develop into a very nice koi. I think to me and my 30 years of study is that sumi is the telling factor to select from on sanke and not beni. The sumi is not broken into pieces that come together. What is showing looks good and is uniform thru out the body with no patches of sunken sumi.
I would bet that in 2 years when this koi skips a year in the mud and is worked on in a cement pond ( if I may borrow a jingle from an old pepsodent commercial) you'll wonder where the yellow went

also because of the type of sumi it is I suspect good gloss and sheen on the skin as it finishes. and yes your right, seeing such a koi in it's tosai stage will give us an idea of what to expect it's third year. To me what one needs to see in it's second year is there. The sumi reminds me somewhat of the old kichinai bloodline. I don't think there will be an over abundance of sumi but what there is of it will be nice and refined.