Blue faces and Majestics are amoung the least hardy angels. That is not to say they can't be kept successfully, but they are not easy. Juveniles are easier to acclimate to aquarium life. The red sea angels like Half moon (Pomacanthus maculosus) and the Asfur angel (P. asfur) are very easy to keep. They tend to be fairly expensive, but most large angels are. They are worth it! Remember it is best to only keep one large angel in a tank, especially if the body shape is at all similar. Never try to keep more than one of any species, as one will end up dead. I also recommend as large a tank as possible for large-type angels. I would say 55 gallons should be the absolute minimum, preferably 100 gallons or more for these beauties.
Sonny