Again, all of your help and advice is greatly appreciated. Believe it or not, I spent quite a bit of time yesterday in front of the tank with my copy of Debelius' 'Angelfish', trying to envision as many different scenarios with as many different suitable Angels as I could. The result? Even more confusion than I began with

. A good problem to have though given so many apparent choices.
One issue that cropped up is that I may not have quite as much room to spare as some of you think I do. So I included a recent grab shot of the tank:
Though the tank is still young, there is obviously plenty of swimming/growing room for the fish and corals. What may not be so obvious from the shot are the many spaces around and in between the rockwork. There are 4 separate 'islands' here that overlap, giving the appearance of one long structure. Plenty of dash holes within them too.
Now my fish list:
17 (or so) Bimaculatus Anthias 1"-4"
5 Bartletts Anthias 1"-4"
2 Borbonius Anthias 2" & 3"
1 Olive Anthias 3"
3 Green Chromis 2"-3"
2 Flame Hawks 1" & 2"
1 Purple Tang 4 1/2"
1 Striatus Bristletooth Tang 5"
1 Copperband Butterfly 4 1/2"
1 Mystery Wrasse 4"
So I guess my question this time isn't which Angel but what size and/or how many. Shoulda done this in the beginning, therefore my apologies to those who've already responded if it causes you to rethink things.