Dan-
Thanks for the before/after pics - comparing the "growth & development" progress shots is one of my favorite koi pasttimes.
Hmmm, at first glance like #2 b/c pattern balance, but wish edges more sharply defined between head & next step. Would probably choose #7 (yeah, I know it's yours

) b/c I generally prefer larger, simpler patterns on kohaku, love her big body and the head/face shape and proportion. May she continue to grow, grow, grow!
All seem to have beautiful skin from pics - love to see them in person.