Thank you Jason for the info and the link on the Acanthurus japonicus and the Acanthurus nigricans.

I have never seen the Acanthurus nigricans in any of my LFS's Just the Acanthurus japonicus But thank you for the education as I didn't know about the Acanthurus nigricans .
Matt Thank you for the response I have herd that also, The browns are more hardy than the blues and I do agree with you that the brown's are very pretty fish also, but I have my mind set on a Powder Blue and I know if I get it and I have problems I am going to say, I should have listened to Matt and Jason.

John That is true no matter what fish you want to get somebody has had a bad experience with them so I think I am going to do some more reading and ask some more questions but in the end I think I am going to get the powder blue.
I think I will set up a hospital tank just in case before I get it Thanks to all and if anyone has or had a powder blue please feel free to give me your opinion

....................... John