They will also need lots of space. Fast swimmers & very active most of the time. Can grow to 8" or more so need a 6' tank at least (IMO). Under the right conditions, fast growers too. My Elongate tang (A. mata) is similar in shape & it grows an average of 1"/month.
Read up on wetwebmedia because Bob Fenner has a really good article on them. One of his all-time favourites, but definitely not for everyone or even for most people's tanks. However, if your tank is big enough & you're willing to not put in any more fish (highly recommended as the last fish to go into the tank) then it will definitely be a showpiece fish. My friend Randy has a gorgeous one about 7" that's just getting in the really intense adult colouration. Most beautiful fish I've seen.
Anthony