Do you have Eric Borneman's book Aquarium Corals? This book is one of the more comprehensive books on popular corals.
It's good to do a good research on corals, but you seem to be overly concerned about toxicity of corals. As Nicole pointed out in another thread of yours, corals will fight one way or another, even within the same species. However, as long as you stay within the same species or the type of corals that are known to occur in the same area, you have less to worry about. If you are fond of LPS's and SPS's, I suggest that you stay away from certain soft corals. Eric Borneman lists Sarcophyton, Lemnalia, Sinularia, Nephthea, Lobophytum and Cespitularia to be highly toxic. Some LPS's also have very powerful nematocysts that can harpoon a long distance. You might want to be careful with these as well.
I recall that you mentioned somewhere that your tank is nearly 4 months old. You might consider letting your tank mature a bit more before getting into SPS's and more challenging type of corals. I find new tanks are less forgiving about aquarist's mistakes.
Tomoko