Large angels are very hit or miss. I have had 2 chrysurus one was fine and the other ate every coral in the tank. In my opinion i wouldnt keep any large angels wit hany softys or LPS. Most large angels that i have seen seem to do best in a SPS tank. There are definetly aceptions to the rule like i said they are very hit or miss. If you decide to add one just keep in mind there is a chance you may have to get it out