Dwarf Dwarf Angels

I was considering getting a dwarf angel, specifically the flameback C. acanthops/aureantous(sp?), or C. argi. Both fish have a pro and con for my tank. The argi is much smaller and would do better in my tank size, but he is an aggressive little thing, and would be hard to add a 3rd fish, with a clown goby already in there. I like the flameback's appearance much more, except he is a little larger and not sure he would do as well in a 36 gallon. I also have to consider them in a reef. Anyonebody keep these guys? Looking for some experience info.

 

Hard to find out the necessary info about these guys. I was told by one person on WWM that C. acanthops and C. argi were better candidates for my tank, yet another just said that C. argi was the only one that would do well.