Update
Just thought I would update everyone and provide a few pictures. (And questions of course!)
So far, so good. When I initially rearranged and added the three more angels, I feared at first that all had been for naught. Initially, the Gold angel "A" continued to pester Gold "B". However, within 36 hours or so, this had completely stopped.

I'm not seeing anything but the mildest of aggression now. Yay!
As I feared, I have had some ammonia readings, but not too bad and I'm doing big WC's as soon as I see them. I also added some gravel in a panty hose leg (trying to figure out the singular of panty hose - LOL) from my 27 gallon, which is completely cycled and further along.
I took some pictures of "everyone" to share. They seem very healthy, energetic and outgoing. All rush the top and the glass when they see me, hoping for food.
My original three. Gold Angel A. He has had that red showing on both gills since I got him. Is that just a conformational thing?
Gold angel B - the one that was getting picked on. He did a bit of damage to his fins, hiding under the stump he's showing you in the picture. However, it wasn't bad. I haven't seen him back under there since the new introductions.
http://i9.photobucket.com/albums/a89/ExtraHannah/Aquarium/_MG_7509GoldBW.jpg
My Koi angel:
Now the three new "guys".
Marble "A" (who I find much more attractive IRL):
Marble "B":
And my Black:
If anyone sees any obvious problems with these guys, please let me know. As I said, all seem healthy and happy to me, but I'm new to this!