Sounds like a great system so far. Love all the inverts. The only concern is the flame angel. Keep an eye on her when adding corals. She may pick at them. If you are in the medium flow area, you can place most lps accordingly. I would start with hammer (euphyllia) as an easy beginner coral. They are pretty, move a bit, like flow and light and the clowns will love them. They may even make them their home. I like the branching type a bit more than the wall. JMO Note, these guys can have sweepers and like to sting other corals, so beware when placing.
If you like acans, start with one and see how they handle the light and system. Also, I would worry a bit about the angel with them. Maybe keep a cover over them till she gets used to them being in there. Clear net or clear plastic cup (holes for flow and light). Only like a week or less. I love them, but only one of my system can handle them. They usually like lower light and flow. Keep on the sand/bottom for that.
Frogpawn is similar to hammer. Torches are a bit more picky and delicate. They like more food.
A clam or nem, I would hold off a while. Nem would be fine as soon as you are comfortable with stability and lots of pods. They will like the medium flow and need lots of light (bta would be best option). Also the clowns may love it! If you are looking at rock nems or maxi mini carpets, clowns will not be hosted by them, but they do like a dirtier system. I would personally do the bta first in your system. Get a healthy nice size one. I would wait another few months on that. Maybe even a full 6 months.
The clam is a different animal. You need appropriate lighting for these guys. Some can get really large fast. What size tank? What lights? Babies are tough to keep, larger ones are a bit easier, but depends on the clam. Do you have a favorite species?
