Blue tang baby then when big give it to my friend--No, I don't like the idea of "When it gets big I'll......." If you can't keep it then, don't keep it now.
Yellow tang--I am not a fan of their personality
Scopas tang--The color is too drab for my liking. Just not worth taking up realestate IMHO
Moorish Idol--It will die. Even experts struggle to keep this fish for any length of time.
Not to be a dink, but do you have any other choices?