Judging by the pictures presented to us, I think C has the overall package. It clearly has the best body conformation. Koi C also has just a clear a head as the others. If you have a closer look at the blue background that koi C was pictured in a darker atmosphere creating a darker skin tone and harder to see the luster. Koi C seems to be the largest of three as well. The pattern in koi C is also good with pattern stopping before the tail joint. Then, I would follow with koi B being again better conformation than koi A with also a clear head and nice pattern. Koi A being the smallest at this point which has a lot of growing to do before it can compete against the other two. Also the hi on the tail joint is a little distracting.
As for what I would like to see in my pond on the other hand is yet another story!