the pic of the mimic you showed was not the fish I was thinking of. It is an Indian Ocean variety. It is not super-expensive, but very pretty. they look just like the ebili angel. They may even be called the ebili mimic tang. check it out.
Let's see, desjardini, purple (no Sohal, you will just have to covet mine:Cheers:), how about the Regal (passive and just amazing color), Achilles (acanthrus) Tangs are just incredible. My LFS just got two in and they are amazing. not too hardy, but if they are available and eating may be worth it. Look to get a tang from Acanthrus. that would be clown tang, achilles, powder blue, powder brown, white-cheek, atlantic blue...OH YEAH, Check for an Atlantic Blue...that are AWESOME!!!
OK, Atlantic Blue or Achilles.
-Doc