You're too nice.
bad badger 1,
I am somewhat SPS and a little LPS mad ;-).
I don't know an Angelfish species, that I would consider SPS-safe.
Regarding SPS they should be called Devilfishes
.
The Pygme (dwarf) Angelfishes are IMHO somewhat safer, but still a risk.
I once had a pair of Flame angels (Centropyge loriculus) in a prior tank, that did not
touch my SPS at all.
You're right, they're beauties, moving different from other fishes.
If the surgeons are bigger, coralgrow still good and still no NO3 detectable, I maybe give
them a chance (but that will take 1-2 years from now). In a tank like this, there is no way
back, I don't think that I can catch them out again.
For now, the only thing I would add is a small harem (1,2) of Pseudochromis fridmani.
Btw., I gave away the one goby (Amblygobius phalaena) that wasn't killed by the Kole tang and replaced it with a (smaller) pair of Valenciennea muralis 3 days ago.
They've already built their cave and sleep there at night.
Strange but great, The Kole ignores them totally! No fights anymore!
Ralf